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Merge branch 'repl-feature' into develop

This commit is contained in:
siddontang 2014-09-29 14:13:21 +08:00
parent ee59af0062 956a8b4421
commit e143448fdd
67 changed files with 2612 additions and 1907 deletions
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4
README.md
View File

@ -13,7 +13,7 @@ LedisDB now supports multiple databases as backend to store data, you can test a
+ Supports lua scripting.
+ Supports expiration and ttl.
+ Supports using redis-cli directly.
+ Multiple client API supports, including Go, Python, Lua(Openresty), C/C++, Node.js.
+ Multiple client API support, including Go, Python, Lua(Openresty), C/C++, Node.js.
+ Easy to embed in your own Go application.
+ Restful API support, json/bson/msgpack output.
+ Replication to guarantee data safe.
@ -75,7 +75,7 @@ Create a workspace and checkout ledisdb source
## Choose store database
LedisDB now supports goleveldb, lmdb, leveldb, rocksdb, boltdb, hyperleveldb. it will choose goleveldb as default to store data if you not set.
LedisDB now supports goleveldb, lmdb, leveldb, rocksdb, boltdb, hyperleveldb, memory. it will choose goleveldb as default to store data if you don't set.
Choosing a store database to use is very simple, you have two ways:

10
bootstrap.sh
View File

@ -2,9 +2,6 @@
. ./dev.sh
go get github.com/siddontang/go-log/log
go get github.com/siddontang/go-snappy/snappy
go get github.com/siddontang/goleveldb/leveldb
go get github.com/szferi/gomdb
@ -14,4 +11,9 @@ go get github.com/boltdb/bolt
go get github.com/ugorji/go/codec
go get github.com/BurntSushi/toml
go get github.com/siddontang/go-bson/bson
go get github.com/siddontang/go/bson
go get github.com/siddontang/go/log
go get github.com/siddontang/go/snappy
go get github.com/siddontang/go/num
go get github.com/siddontang/go/filelock

96
client/openresty/tx_test.lua
View File

@ -1,96 +0,0 @@
local ledis = require "ledis"
local lds = ledis:new()
lds:set_timeout(1000)
-- connect
local ok, err = lds:connect("127.0.0.1", "6380")
if not ok then
ngx.say("failed to connect:", err)
return
end
lds:del("tx")
-- transaction
ok, err = lds:set("tx", "a")
if not ok then
ngx.say("failed to execute set in tx: ", err)
return
end
ngx.say("SET should be OK <=>", ok)
res, err = lds:get("tx")
if not res then
ngx.say("failed to execute get in tx: ", err)
return
end
ngx.say("GET should be a <=>", res)
ok, err = lds:begin()
if not ok then
ngx.say("failed to run begin: ", err)
return
end
ngx.say("BEGIN should be OK <=>", ok)
ok, err = lds:set("tx", "b")
if not ok then
ngx.say("failed to execute set in tx: ", err)
return
end
ngx.say("SET should be OK <=>", ok)
res, err = lds:get("tx")
if not res then
ngx.say("failed to execute get in tx: ", err)
return
end
ngx.say("GET should be b <=>", res)
ok, err = lds:rollback()
if not ok then
ngx.say("failed to rollback", err)
return
end
ngx.say("ROLLBACK should be OK <=>", ok)
res, err = lds:get("tx")
if not res then
ngx.say("failed to execute get in tx: ", err)
return
end
ngx.say("GET should be a <=>", res)
lds:begin()
lds:set("tx", "c")
lds:commit()
res, err = lds:get("tx")
if not res then
ngx.say("failed to execute get in tx: ", err)
return
end
ngx.say("GET should be c <=>", res)
local ok, err = lds:close()
if not ok then
ngx.say("failed to close: ", err)
return
end
ngx.say("close success")

85
cmd/ledis-binlog/main.go
View File

@ -1,85 +0,0 @@
package main
import (
"bufio"
"flag"
"fmt"
"github.com/siddontang/ledisdb/ledis"
"os"
"time"
)
var TimeFormat = "2006-01-02 15:04:05"
var startDateTime = flag.String("start-datetime", "",
"Start reading the binary log at the first event having a timestamp equal to or later than the datetime argument.")
var stopDateTime = flag.String("stop-datetime", "",
"Stop reading the binary log at the first event having a timestamp equal to or earlier than the datetime argument.")
var startTime uint32 = 0
var stopTime uint32 = 0xFFFFFFFF
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s [options] log_file\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
logFile := flag.Arg(0)
f, err := os.Open(logFile)
if err != nil {
println(err.Error())
return
}
defer f.Close()
var t time.Time
if len(*startDateTime) > 0 {
if t, err = time.Parse(TimeFormat, *startDateTime); err != nil {
println("parse start-datetime error: ", err.Error())
return
}
startTime = uint32(t.Unix())
}
if len(*stopDateTime) > 0 {
if t, err = time.Parse(TimeFormat, *stopDateTime); err != nil {
println("parse stop-datetime error: ", err.Error())
return
}
stopTime = uint32(t.Unix())
}
rb := bufio.NewReaderSize(f, 4096)
err = ledis.ReadEventFromReader(rb, printEvent)
if err != nil {
println("read event error: ", err.Error())
return
}
}
func printEvent(head *ledis.BinLogHead, event []byte) error {
if head.CreateTime < startTime || head.CreateTime > stopTime {
return nil
}
t := time.Unix(int64(head.CreateTime), 0)
fmt.Printf("%s ", t.Format(TimeFormat))
s, err := ledis.FormatBinLogEvent(event)
if err != nil {
fmt.Printf("%s", err.Error())
} else {
fmt.Printf(s)
}
fmt.Printf("\n")
return nil
}

2
cmd/ledis-cli/const.go
View File

@ -1,4 +1,4 @@
//This file was generated by .tools/generate_commands.py on Tue Sep 09 2014 09:48:57 +0800
//This file was generated by .tools/generate_commands.py on Thu Sep 25 2014 09:51:10 +0800
package main
var helpCommands = [][]string{

15
cmd/ledis-load/main.go
View File

@ -2,7 +2,6 @@ package main
import (
"flag"
"fmt"
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/ledis"
)
@ -57,18 +56,6 @@ func loadDump(cfg *config.Config, ldb *ledis.Ledis) error {
return err
}
var head *ledis.BinLogAnchor
head, err = ldb.LoadDumpFile(*dumpPath)
if err != nil {
_, err = ldb.LoadDumpFile(*dumpPath)
return err
}
//master enable binlog, here output this like mysql
if head.LogFileIndex != 0 && head.LogPos != 0 {
format := "MASTER_LOG_FILE='binlog.%07d', MASTER_LOG_POS=%d;\n"
fmt.Printf(format, head.LogFileIndex, head.LogPos)
}
return nil
}

50
config/config.go
View File

@ -16,14 +16,6 @@ const (
DefaultDataDir string = "./var"
)
const (
MaxBinLogFileSize int = 1024 * 1024 * 1024
MaxBinLogFileNum int = 10000
DefaultBinLogFileSize int = MaxBinLogFileSize
DefaultBinLogFileNum int = 10
)
type LevelDBConfig struct {
Compression bool `toml:"compression"`
BlockSize int `toml:"block_size"`
@ -37,9 +29,12 @@ type LMDBConfig struct {
NoSync bool `toml:"nosync"`
}
type BinLogConfig struct {
MaxFileSize int `toml:"max_file_size"`
MaxFileNum int `toml:"max_file_num"`
type ReplicationConfig struct {
Path string `toml:"path"`
ExpiredLogDays int `toml:"expired_log_days"`
Sync bool `toml:"sync"`
WaitSyncTime int `toml:"wait_sync_time"`
Compression bool `toml:"compression"`
}
type Config struct {
@ -47,19 +42,22 @@ type Config struct {
HttpAddr string `toml:"http_addr"`
SlaveOf string `toml:"slaveof"`
DataDir string `toml:"data_dir"`
DBName string `toml:"db_name"`
DBPath string `toml:"db_path"`
LevelDB LevelDBConfig `toml:"leveldb"`
LMDB LMDBConfig `toml:"lmdb"`
BinLog BinLogConfig `toml:"binlog"`
SlaveOf string `toml:"slaveof"`
AccessLog string `toml:"access_log"`
UseReplication bool `toml:"use_replication"`
Replication ReplicationConfig `toml:"replication"`
}
func NewConfigWithFile(fileName string) (*Config, error) {
@ -92,11 +90,6 @@ func NewConfigDefault() *Config {
cfg.DBName = DefaultDBName
// disable binlog
cfg.BinLog.MaxFileNum = 0
cfg.BinLog.MaxFileSize = 0
// disable replication
cfg.SlaveOf = ""
// disable access log
@ -105,6 +98,9 @@ func NewConfigDefault() *Config {
cfg.LMDB.MapSize = 20 * 1024 * 1024
cfg.LMDB.NoSync = true
cfg.Replication.WaitSyncTime = 1
cfg.Replication.Compression = true
return cfg
}
@ -125,17 +121,3 @@ func (cfg *LevelDBConfig) Adjust() {
cfg.MaxOpenFiles = 1024
}
}
func (cfg *BinLogConfig) Adjust() {
if cfg.MaxFileSize <= 0 {
cfg.MaxFileSize = DefaultBinLogFileSize
} else if cfg.MaxFileSize > MaxBinLogFileSize {
cfg.MaxFileSize = MaxBinLogFileSize
}
if cfg.MaxFileNum <= 0 {
cfg.MaxFileNum = DefaultBinLogFileNum
} else if cfg.MaxFileNum > MaxBinLogFileNum {
cfg.MaxFileNum = MaxBinLogFileNum
}
}

25
config/config.toml
View File

@ -13,6 +13,7 @@ data_dir = "/tmp/ledis_server"
access_log = ""
# Set slaveof to enable replication from master, empty, no replication
# Any write operations except flushall and replication will be disabled in slave mode.
slaveof = ""
# Choose which backend storage to use, now support:
@ -27,6 +28,12 @@ slaveof = ""
#
db_name = "leveldb"
# If not set, use data_dir/"db_name"_data
db_path = ""
# enable replication or not
use_replication = true
[leveldb]
compression = false
block_size = 32768
@ -38,8 +45,20 @@ max_open_files = 1024
map_size = 524288000
nosync = true
[binlog]
max_file_size = 0
max_file_num = 0
[replication]
# Path to store replication information(write ahead log, commit log, etc.)
# if not set, use data_dir/rpl
path = ""
# Expire write ahead logs after the given days
expired_log_days = 7
# If sync is true, the new log must be sent to some slaves, and then commit.
# It will reduce performance but have better high availability.
sync = true
# If sync is true, wait at last wait_sync_time seconds for slave syncing this log
wait_sync_time = 1
# Compress the log or not
compression = true

20
config/config_test.go
View File

@ -1,31 +1,13 @@
package config
import (
"reflect"
"testing"
)
func TestConfig(t *testing.T) {
dstCfg := new(Config)
dstCfg.Addr = "127.0.0.1:6380"
dstCfg.HttpAddr = "127.0.0.1:11181"
dstCfg.DataDir = "/tmp/ledis_server"
dstCfg.DBName = "leveldb"
dstCfg.LevelDB.Compression = false
dstCfg.LevelDB.BlockSize = 32768
dstCfg.LevelDB.WriteBufferSize = 67108864
dstCfg.LevelDB.CacheSize = 524288000
dstCfg.LevelDB.MaxOpenFiles = 1024
dstCfg.LMDB.MapSize = 524288000
dstCfg.LMDB.NoSync = true
cfg, err := NewConfigWithFile("./config.toml")
_, err := NewConfigWithFile("./config.toml")
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(dstCfg, cfg) {
t.Fatal("parse toml error")
}
}

75
doc/Replication.md Normal file
View File

@ -0,0 +1,75 @@
At first, LedisDB uses BinLog (like MySQL BinLog) to support replication. Slave syncs logs from Master with specified BinLog filename and position. It is simple but not suitable for some cases.
Let's assume below scenario: A -> B and A -> C, here A is master, B and C are slaves. -> means "replicates to". If master A failed, we must select B or C as the new master. Usually, we must choose the one which has most up to date from A, but it is not easy to check which one is it.
MySQL has the same problem for this, so from MySQL 5.6, it introduces GTID (Global Transaction ID) to solve it. GTID is very powerful but a little complex, I just want to a simple and easy solution.
Before GTID, Google has supplied a solution called [Global Transaction IDs](https://code.google.com/p/google-mysql-tools/wiki/GlobalTransactionIds) which uses a monotonically increasing group id to represent an unique transaction event in BinLog. Although it has some limitations for MySQL hierarchical replication, I still think using a integer id like group id for log event is simple and suitable for LedisDB.
Another implementation influencing me is [Raft](http://raftconsensus.github.io/), a consensus algorithm based on the replicated log. Leader must ensure that some followers receive the replicated log before executing the commands in log. The log has an unique log id (like group id above), if the leader failed, the candidate which has the up to date log (checked by log id) will be elected a new leader.
Refer above, I supply a simple solution for LedisDB's replication.
## Keyword
+ LogID: a monotonically increasing integer for a log
+ FirstLogID: the oldest log id for a server, all the logs before this id have been purged.
+ LastLogID: the newest log id for a server.
+ CommitID: the last log committed to execute. If LastLogID is 10 and CommitID is 5, server needs to commit logs from 6 - 10 to catch the up to date status.
## Sync Flow
For a master, every write changes will be handled below:
1. Logs the changes to disk, it will calculate a new LogID based on LastLogID.
2. Sends this log to slaves and waits the ACK from slaves or timeout.
3. Commits to execute the changes.
4. Updates the CommitID to the LogID.
For a slave:
1. Connects to master and tells it which log to sync by LogID, it may have below cases:
+ The LogID is less than master's FirstLogID, master will tell slave log has been purged, the slave must do a full sync from master first.
+ The master has this log and will send it to slave.
+ The master has not this log (The slave has up to date with master). Slave will wait for some time or timeout then to start a new sync.
2. After slave receiving a log (eg. LogID 10), it will save this log to disk and notice the replication thread to handle it.
3. Slave will start a new sync with LogID 11.
## Full Sync Flow
If slave syncs a log but master has purged it, slave has to start a full sync.
+ Master generates a snapshot with current LastLogID and dumps to a file.
+ Slave discards all old data and replicated logs, then loads the dump file and updates CommitID with LastLogID in dump file.
+ Slave starts to sync with LogID = CommitID + 1.
## ReadOnly
Slave is always read only, which means that any write operations will be denied except `FlushAll` and replication.
For a master, if it first writes log OK but commits or updates CommitID error, it will also turn into read only mode until replication thread executes this log correctly.
## Strong Consensus Replication
For the sync flow, we see that master will wait some slaves to return an ACK telling it has received the log, this mechanism implements strong consensus replication. If master failed, we can choose a slave which has up to date data with the master.
You must notice that this feature has a big influence on the performance. Use your own risk!
## Use
Using replication is very simple for LedisDB, only using `slaveof` command.
+ Use `slaveof host port` to enable replication from master at "host:port".
+ Use `slaveof no one` to stop replication and change the slave to master.
If a slave first syncs from a master A, then uses `slaveof` to sync from master B, it will sync with the LogID = LastLogID + 1. If you want to start over from B, you must use `slaveof host port restart` which will start a full sync first.
## Limitation
+ Replication can not store log less than current LastLogID.
+ Cycle replication is not supported.
+ Master and slave must set `use_replication` to true to support replication.

14
doc/commands.md
View File

@ -119,9 +119,9 @@ Table of Contents
- [BPERSIST key](#bpersist-key)
- [BXSCAN key [MATCH match] [COUNT count]](#bxscan-key-match-match-count-count)
- [Replication](#replication)
- [SLAVEOF host port](#slaveof-host-port)
- [SLAVEOF host port [restart]](#slaveof-host-port-restart)
- [FULLSYNC](#fullsync)
- [SYNC index offset](#sync-index-offset)
- [SYNC logid](#sync-logid)
- [Server](#server)
- [PING](#ping)
- [ECHO message](#echo-message)
@ -2396,13 +2396,13 @@ See [XSCAN](#xscan-key-match-match-count-count) for more information.
## Replication
### SLAVEOF host port
### SLAVEOF host port [restart]
Changes the replication settings of a slave on the fly. If the server is already acting as slave, SLAVEOF NO ONE will turn off the replication.
SLAVEOF host port will make the server a slave of another server listening at the specified host and port.
If a server is already a slave of a master, SLAVEOF host port will stop the replication against the old and start the synchronization against the new one, discarding the old dataset.
If a server is already a slave of a master, SLAVEOF host port will stop the replication against the old and start the synchronization against the new one, if restart is set, it will discard the old dataset, otherwise it will sync with LastLogID + 1.
### FULLSYNC
@ -2416,9 +2416,9 @@ FULLSYNC will first try to sync all data from the master, save in local disk, th
**Examples**
### SYNC index offset
### SYNC logid
Inner command, syncs the new changed from master set by SLAVEOF at offset in binlog.index file.
Inner command, syncs the new changed from master set by SLAVEOF with logid.
**Return value**
@ -2478,7 +2478,7 @@ ERR invalid db index 16
### FLUSHALL
Delete all the keys of all the existing databases, not just the currently selected one. This command never fails.
Delete all the keys of all the existing databases and replication logs, not just the currently selected one. This command never fails.
Very dangerous to use!!!

10
etc/ledis.conf
View File

@ -29,6 +29,9 @@ slaveof = ""
#
db_name = "leveldb"
# if not set, use data_dir/"db_name"_data
db_path = ""
[leveldb]
compression = false
block_size = 32768
@ -40,9 +43,8 @@ max_open_files = 1024
map_size = 524288000
nosync = true
[binlog]
# Set either size or num to 0 to disable binlog
max_file_size = 0
max_file_num = 0
[wal]
# if not set, use data_dir/wal
path = ""

83
ledis/batch.go
View File

@ -1,6 +1,8 @@
package ledis
import (
"github.com/siddontang/go/log"
"github.com/siddontang/ledisdb/rpl"
"github.com/siddontang/ledisdb/store"
"sync"
)
@ -12,29 +14,24 @@ type batch struct {
sync.Locker
logs [][]byte
tx *Tx
eb *eventBatch
}
func (b *batch) Commit() error {
b.l.commitLock.Lock()
defer b.l.commitLock.Unlock()
if b.l.IsReadOnly() {
return ErrWriteInROnly
}
err := b.WriteBatch.Commit()
if b.l.binlog != nil {
if err == nil {
if b.tx == nil {
b.l.binlog.Log(b.logs...)
return b.l.handleCommit(b.eb, b.WriteBatch)
} else {
b.tx.logs = append(b.tx.logs, b.logs...)
if b.l.r != nil {
b.tx.eb.Write(b.eb.Bytes())
}
return b.WriteBatch.Commit()
}
b.logs = [][]byte{}
}
return err
}
func (b *batch) Lock() {
@ -42,26 +39,25 @@ func (b *batch) Lock() {
}
func (b *batch) Unlock() {
if b.l.binlog != nil {
b.logs = [][]byte{}
}
b.eb.Reset()
b.WriteBatch.Rollback()
b.Locker.Unlock()
}
func (b *batch) Put(key []byte, value []byte) {
if b.l.binlog != nil {
buf := encodeBinLogPut(key, value)
b.logs = append(b.logs, buf)
if b.l.r != nil {
b.eb.Put(key, value)
}
b.WriteBatch.Put(key, value)
}
func (b *batch) Delete(key []byte) {
if b.l.binlog != nil {
buf := encodeBinLogDelete(key)
b.logs = append(b.logs, buf)
if b.l.r != nil {
b.eb.Delete(key)
}
b.WriteBatch.Delete(key)
}
@ -97,9 +93,46 @@ func (l *Ledis) newBatch(wb store.WriteBatch, locker sync.Locker, tx *Tx) *batch
b.l = l
b.WriteBatch = wb
b.tx = tx
b.Locker = locker
b.logs = [][]byte{}
b.tx = tx
b.eb = new(eventBatch)
return b
}
type commiter interface {
Commit() error
}
func (l *Ledis) handleCommit(eb *eventBatch, c commiter) error {
l.commitLock.Lock()
defer l.commitLock.Unlock()
var err error
if l.r != nil {
var rl *rpl.Log
if rl, err = l.r.Log(eb.Bytes()); err != nil {
log.Fatal("write wal error %s", err.Error())
return err
}
l.propagate(rl)
if err = c.Commit(); err != nil {
log.Fatal("commit error %s", err.Error())
l.noticeReplication()
return err
}
if err = l.r.UpdateCommitID(rl.ID); err != nil {
log.Fatal("update commit id error %s", err.Error())
l.noticeReplication()
return err
}
return nil
} else {
return c.Commit()
}
}

400
ledis/binlog.go
View File

@ -1,400 +0,0 @@
package ledis
import (
"bufio"
"encoding/binary"
"fmt"
"github.com/siddontang/go-log/log"
"github.com/siddontang/ledisdb/config"
"io"
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"sync"
"time"
)
type BinLogHead struct {
CreateTime uint32
BatchId uint32
PayloadLen uint32
}
func (h *BinLogHead) Len() int {
return 12
}
func (h *BinLogHead) Write(w io.Writer) error {
if err := binary.Write(w, binary.BigEndian, h.CreateTime); err != nil {
return err
}
if err := binary.Write(w, binary.BigEndian, h.BatchId); err != nil {
return err
}
if err := binary.Write(w, binary.BigEndian, h.PayloadLen); err != nil {
return err
}
return nil
}
func (h *BinLogHead) handleReadError(err error) error {
if err == io.EOF {
return io.ErrUnexpectedEOF
} else {
return err
}
}
func (h *BinLogHead) Read(r io.Reader) error {
var err error
if err = binary.Read(r, binary.BigEndian, &h.CreateTime); err != nil {
return err
}
if err = binary.Read(r, binary.BigEndian, &h.BatchId); err != nil {
return h.handleReadError(err)
}
if err = binary.Read(r, binary.BigEndian, &h.PayloadLen); err != nil {
return h.handleReadError(err)
}
return nil
}
func (h *BinLogHead) InSameBatch(ho *BinLogHead) bool {
if h.CreateTime == ho.CreateTime && h.BatchId == ho.BatchId {
return true
} else {
return false
}
}
/*
index file format:
ledis-bin.00001
ledis-bin.00002
ledis-bin.00003
log file format
Log: Head|PayloadData
Head: createTime|batchId|payloadData
*/
type BinLog struct {
sync.Mutex
path string
cfg *config.BinLogConfig
logFile *os.File
logWb *bufio.Writer
indexName string
logNames []string
lastLogIndex int64
batchId uint32
ch chan struct{}
}
func NewBinLog(cfg *config.Config) (*BinLog, error) {
l := new(BinLog)
l.cfg = &cfg.BinLog
l.cfg.Adjust()
l.path = path.Join(cfg.DataDir, "binlog")
if err := os.MkdirAll(l.path, 0755); err != nil {
return nil, err
}
l.logNames = make([]string, 0, 16)
l.ch = make(chan struct{})
if err := l.loadIndex(); err != nil {
return nil, err
}
return l, nil
}
func (l *BinLog) flushIndex() error {
data := strings.Join(l.logNames, "\n")
bakName := fmt.Sprintf("%s.bak", l.indexName)
f, err := os.OpenFile(bakName, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Error("create binlog bak index error %s", err.Error())
return err
}
if _, err := f.WriteString(data); err != nil {
log.Error("write binlog index error %s", err.Error())
f.Close()
return err
}
f.Close()
if err := os.Rename(bakName, l.indexName); err != nil {
log.Error("rename binlog bak index error %s", err.Error())
return err
}
return nil
}
func (l *BinLog) loadIndex() error {
l.indexName = path.Join(l.path, fmt.Sprintf("ledis-bin.index"))
if _, err := os.Stat(l.indexName); os.IsNotExist(err) {
//no index file, nothing to do
} else {
indexData, err := ioutil.ReadFile(l.indexName)
if err != nil {
return err
}
lines := strings.Split(string(indexData), "\n")
for _, line := range lines {
line = strings.Trim(line, "\r\n ")
if len(line) == 0 {
continue
}
if _, err := os.Stat(path.Join(l.path, line)); err != nil {
log.Error("load index line %s error %s", line, err.Error())
return err
} else {
l.logNames = append(l.logNames, line)
}
}
}
if l.cfg.MaxFileNum > 0 && len(l.logNames) > l.cfg.MaxFileNum {
//remove oldest logfile
if err := l.Purge(len(l.logNames) - l.cfg.MaxFileNum); err != nil {
return err
}
}
var err error
if len(l.logNames) == 0 {
l.lastLogIndex = 1
} else {
lastName := l.logNames[len(l.logNames)-1]
if l.lastLogIndex, err = strconv.ParseInt(path.Ext(lastName)[1:], 10, 64); err != nil {
log.Error("invalid logfile name %s", err.Error())
return err
}
//like mysql, if server restart, a new binlog will create
l.lastLogIndex++
}
return nil
}
func (l *BinLog) getLogFile() string {
return l.FormatLogFileName(l.lastLogIndex)
}
func (l *BinLog) openNewLogFile() error {
var err error
lastName := l.getLogFile()
logPath := path.Join(l.path, lastName)
if l.logFile, err = os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY, 0644); err != nil {
log.Error("open new logfile error %s", err.Error())
return err
}
if l.cfg.MaxFileNum > 0 && len(l.logNames) == l.cfg.MaxFileNum {
l.purge(1)
}
l.logNames = append(l.logNames, lastName)
if l.logWb == nil {
l.logWb = bufio.NewWriterSize(l.logFile, 1024)
} else {
l.logWb.Reset(l.logFile)
}
if err = l.flushIndex(); err != nil {
return err
}
return nil
}
func (l *BinLog) checkLogFileSize() bool {
if l.logFile == nil {
return false
}
st, _ := l.logFile.Stat()
if st.Size() >= int64(l.cfg.MaxFileSize) {
l.closeLog()
return true
}
return false
}
func (l *BinLog) closeLog() {
if l.logFile == nil {
return
}
l.lastLogIndex++
l.logFile.Close()
l.logFile = nil
}
func (l *BinLog) purge(n int) {
if len(l.logNames) < n {
n = len(l.logNames)
}
for i := 0; i < n; i++ {
logPath := path.Join(l.path, l.logNames[i])
os.Remove(logPath)
}
copy(l.logNames[0:], l.logNames[n:])
l.logNames = l.logNames[0 : len(l.logNames)-n]
}
func (l *BinLog) Close() {
if l.logFile != nil {
l.logFile.Close()
l.logFile = nil
}
}
func (l *BinLog) LogNames() []string {
return l.logNames
}
func (l *BinLog) LogFileName() string {
return l.getLogFile()
}
func (l *BinLog) LogFilePos() int64 {
if l.logFile == nil {
return 0
} else {
st, _ := l.logFile.Stat()
return st.Size()
}
}
func (l *BinLog) LogFileIndex() int64 {
return l.lastLogIndex
}
func (l *BinLog) FormatLogFileName(index int64) string {
return fmt.Sprintf("ledis-bin.%07d", index)
}
func (l *BinLog) FormatLogFilePath(index int64) string {
return path.Join(l.path, l.FormatLogFileName(index))
}
func (l *BinLog) LogPath() string {
return l.path
}
func (l *BinLog) Purge(n int) error {
l.Lock()
defer l.Unlock()
if len(l.logNames) == 0 {
return nil
}
if n >= len(l.logNames) {
n = len(l.logNames)
//can not purge current log file
if l.logNames[n-1] == l.getLogFile() {
n = n - 1
}
}
l.purge(n)
return l.flushIndex()
}
func (l *BinLog) PurgeAll() error {
l.Lock()
defer l.Unlock()
l.closeLog()
l.purge(len(l.logNames))
return l.openNewLogFile()
}
func (l *BinLog) Log(args ...[]byte) error {
l.Lock()
defer l.Unlock()
var err error
if l.logFile == nil {
if err = l.openNewLogFile(); err != nil {
return err
}
}
head := &BinLogHead{}
head.CreateTime = uint32(time.Now().Unix())
head.BatchId = l.batchId
l.batchId++
for _, data := range args {
head.PayloadLen = uint32(len(data))
if err := head.Write(l.logWb); err != nil {
return err
}
if _, err := l.logWb.Write(data); err != nil {
return err
}
}
if err = l.logWb.Flush(); err != nil {
log.Error("write log error %s", err.Error())
return err
}
l.checkLogFileSize()
close(l.ch)
l.ch = make(chan struct{})
return nil
}
func (l *BinLog) Wait() <-chan struct{} {
return l.ch
}

49
ledis/binlog_test.go
View File

@ -1,49 +0,0 @@
package ledis
import (
"github.com/siddontang/ledisdb/config"
"io/ioutil"
"os"
"testing"
)
func TestBinLog(t *testing.T) {
cfg := new(config.Config)
cfg.BinLog.MaxFileNum = 1
cfg.BinLog.MaxFileSize = 1024
cfg.DataDir = "/tmp/ledis_binlog"
os.RemoveAll(cfg.DataDir)
b, err := NewBinLog(cfg)
if err != nil {
t.Fatal(err)
}
if err := b.Log(make([]byte, 1024)); err != nil {
t.Fatal(err)
}
if err := b.Log(make([]byte, 1024)); err != nil {
t.Fatal(err)
}
if fs, err := ioutil.ReadDir(b.LogPath()); err != nil {
t.Fatal(err)
} else if len(fs) != 2 {
t.Fatal(len(fs))
}
if err := b.PurgeAll(); err != nil {
t.Fatal(err)
}
if fs, err := ioutil.ReadDir(b.LogPath()); err != nil {
t.Fatal(err)
} else if len(fs) != 2 {
t.Fatal(len(fs))
} else if b.LogFilePos() != 0 {
t.Fatal(b.LogFilePos())
}
}

215
ledis/binlog_util.go
View File

@ -1,215 +0,0 @@
package ledis
import (
"encoding/binary"
"errors"
"fmt"
"strconv"
)
var (
errBinLogDeleteType = errors.New("invalid bin log delete type")
errBinLogPutType = errors.New("invalid bin log put type")
errBinLogCommandType = errors.New("invalid bin log command type")
)
func encodeBinLogDelete(key []byte) []byte {
buf := make([]byte, 1+len(key))
buf[0] = BinLogTypeDeletion
copy(buf[1:], key)
return buf
}
func decodeBinLogDelete(sz []byte) ([]byte, error) {
if len(sz) < 1 || sz[0] != BinLogTypeDeletion {
return nil, errBinLogDeleteType
}
return sz[1:], nil
}
func encodeBinLogPut(key []byte, value []byte) []byte {
buf := make([]byte, 3+len(key)+len(value))
buf[0] = BinLogTypePut
pos := 1
binary.BigEndian.PutUint16(buf[pos:], uint16(len(key)))
pos += 2
copy(buf[pos:], key)
pos += len(key)
copy(buf[pos:], value)
return buf
}
func decodeBinLogPut(sz []byte) ([]byte, []byte, error) {
if len(sz) < 3 || sz[0] != BinLogTypePut {
return nil, nil, errBinLogPutType
}
keyLen := int(binary.BigEndian.Uint16(sz[1:]))
if 3+keyLen > len(sz) {
return nil, nil, errBinLogPutType
}
return sz[3 : 3+keyLen], sz[3+keyLen:], nil
}
func FormatBinLogEvent(event []byte) (string, error) {
logType := uint8(event[0])
var err error
var k []byte
var v []byte
var buf []byte = make([]byte, 0, 1024)
switch logType {
case BinLogTypePut:
k, v, err = decodeBinLogPut(event)
buf = append(buf, "PUT "...)
case BinLogTypeDeletion:
k, err = decodeBinLogDelete(event)
buf = append(buf, "DELETE "...)
default:
err = errInvalidBinLogEvent
}
if err != nil {
return "", err
}
if buf, err = formatDataKey(buf, k); err != nil {
return "", err
}
if v != nil && len(v) != 0 {
buf = append(buf, fmt.Sprintf(" %q", v)...)
}
return String(buf), nil
}
func formatDataKey(buf []byte, k []byte) ([]byte, error) {
if len(k) < 2 {
return nil, errInvalidBinLogEvent
}
buf = append(buf, fmt.Sprintf("DB:%2d ", k[0])...)
buf = append(buf, fmt.Sprintf("%s ", TypeName[k[1]])...)
db := new(DB)
db.index = k[0]
//to do format at respective place
switch k[1] {
case KVType:
if key, err := db.decodeKVKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case HashType:
if key, field, err := db.hDecodeHashKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(field))
}
case HSizeType:
if key, err := db.hDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case ListType:
if key, seq, err := db.lDecodeListKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, int64(seq), 10)
}
case LMetaType:
if key, err := db.lDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case ZSetType:
if key, m, err := db.zDecodeSetKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(m))
}
case ZSizeType:
if key, err := db.zDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case ZScoreType:
if key, m, score, err := db.zDecodeScoreKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(m))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, score, 10)
}
case BitType:
if key, seq, err := db.bDecodeBinKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendUint(buf, uint64(seq), 10)
}
case BitMetaType:
if key, err := db.bDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case SetType:
if key, member, err := db.sDecodeSetKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(member))
}
case SSizeType:
if key, err := db.sDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, String(key))
}
case ExpTimeType:
if tp, key, t, err := db.expDecodeTimeKey(k); err != nil {
return nil, err
} else {
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, t, 10)
}
case ExpMetaType:
if tp, key, err := db.expDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, String(key))
}
default:
return nil, errInvalidBinLogEvent
}
return buf, nil
}

16
ledis/const.go
View File

@ -23,6 +23,8 @@ const (
ExpTimeType byte = 101
ExpMetaType byte = 102
MetaType byte = 201
)
var (
@ -44,6 +46,11 @@ var (
}
)
const (
RDWRMode = 0
ROnlyMode = 1
)
const (
defaultScanCount int = 10
)
@ -79,12 +86,9 @@ const (
var (
ErrScoreMiss = errors.New("zset score miss")
)
const (
BinLogTypeDeletion uint8 = 0x0
BinLogTypePut uint8 = 0x1
BinLogTypeCommand uint8 = 0x2
ErrWriteInROnly = errors.New("write not support in readonly mode")
ErrRplInRDWR = errors.New("replication not support in read write mode")
ErrRplNotSupport = errors.New("replication not support")
)
const (

5
ledis/doc.go
View File

@ -2,7 +2,7 @@
//
// Ledis supports various data structure like kv, list, hash and zset like redis.
//
// Other features include binlog replication, data with a limited time-to-live.
// Other features include replication, data with a limited time-to-live.
//
// Usage
//
@ -54,8 +54,5 @@
// n, err := db.ZAdd(key, ScorePair{score1, member1}, ScorePair{score2, member2})
// ay, err := db.ZRangeByScore(key, minScore, maxScore, 0, -1)
//
// Binlog
//
// ledis supports binlog, so you can sync binlog to another server for replication. If you want to open binlog support, set UseBinLog to true in config.
//
package ledis

81
ledis/dump.go
View File

@ -4,41 +4,26 @@ import (
"bufio"
"bytes"
"encoding/binary"
"github.com/siddontang/go-snappy/snappy"
"github.com/siddontang/go/snappy"
"github.com/siddontang/ledisdb/store"
"io"
"os"
)
//dump format
// fileIndex(bigendian int64)|filePos(bigendian int64)
// |keylen(bigendian int32)|key|valuelen(bigendian int32)|value......
//
//key and value are both compressed for fast transfer dump on network using snappy
type BinLogAnchor struct {
LogFileIndex int64
LogPos int64
type DumpHead struct {
CommitID uint64
}
func (m *BinLogAnchor) WriteTo(w io.Writer) error {
if err := binary.Write(w, binary.BigEndian, m.LogFileIndex); err != nil {
func (h *DumpHead) Read(r io.Reader) error {
if err := binary.Read(r, binary.BigEndian, &h.CommitID); err != nil {
return err
}
if err := binary.Write(w, binary.BigEndian, m.LogPos); err != nil {
return err
}
return nil
}
func (m *BinLogAnchor) ReadFrom(r io.Reader) error {
err := binary.Read(r, binary.BigEndian, &m.LogFileIndex)
if err != nil {
return err
}
err = binary.Read(r, binary.BigEndian, &m.LogPos)
if err != nil {
func (h *DumpHead) Write(w io.Writer) error {
if err := binary.Write(w, binary.BigEndian, h.CommitID); err != nil {
return err
}
@ -56,24 +41,35 @@ func (l *Ledis) DumpFile(path string) error {
}
func (l *Ledis) Dump(w io.Writer) error {
m := new(BinLogAnchor)
var err error
var commitID uint64
var snap *store.Snapshot
{
l.wLock.Lock()
defer l.wLock.Unlock()
if l.binlog != nil {
m.LogFileIndex = l.binlog.LogFileIndex()
m.LogPos = l.binlog.LogFilePos()
if l.r != nil {
if commitID, err = l.r.LastCommitID(); err != nil {
return err
}
}
if snap, err = l.ldb.NewSnapshot(); err != nil {
return err
}
}
wb := bufio.NewWriterSize(w, 4096)
if err = m.WriteTo(wb); err != nil {
h := &DumpHead{commitID}
if err = h.Write(wb); err != nil {
return err
}
it := l.ldb.NewIterator()
it := snap.NewIterator()
it.SeekToFirst()
compressBuf := make([]byte, 4096)
@ -118,7 +114,8 @@ func (l *Ledis) Dump(w io.Writer) error {
return nil
}
func (l *Ledis) LoadDumpFile(path string) (*BinLogAnchor, error) {
// clear all data and load dump file to db
func (l *Ledis) LoadDumpFile(path string) (*DumpHead, error) {
f, err := os.Open(path)
if err != nil {
return nil, err
@ -128,16 +125,21 @@ func (l *Ledis) LoadDumpFile(path string) (*BinLogAnchor, error) {
return l.LoadDump(f)
}
func (l *Ledis) LoadDump(r io.Reader) (*BinLogAnchor, error) {
// clear all data and load dump file to db
func (l *Ledis) LoadDump(r io.Reader) (*DumpHead, error) {
l.wLock.Lock()
defer l.wLock.Unlock()
info := new(BinLogAnchor)
var err error
if err = l.flushAll(); err != nil {
return nil, err
}
rb := bufio.NewReaderSize(r, 4096)
err := info.ReadFrom(rb)
if err != nil {
h := new(DumpHead)
if err = h.Read(rb); err != nil {
return nil, err
}
@ -190,10 +192,11 @@ func (l *Ledis) LoadDump(r io.Reader) (*BinLogAnchor, error) {
deKeyBuf = nil
deValueBuf = nil
//if binlog enable, we will delete all binlogs and open a new one for handling simply
if l.binlog != nil {
l.binlog.PurgeAll()
if l.r != nil {
if err := l.r.UpdateCommitID(h.CommitID); err != nil {
return nil, err
}
}
return info, nil
return h, nil
}

223
ledis/event.go Normal file
View File

@ -0,0 +1,223 @@
package ledis
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"github.com/siddontang/go/hack"
"io"
"strconv"
)
const (
kTypeDeleteEvent uint8 = 0
kTypePutEvent uint8 = 1
)
var (
errInvalidPutEvent = errors.New("invalid put event")
errInvalidDeleteEvent = errors.New("invalid delete event")
errInvalidEvent = errors.New("invalid event")
)
type eventBatch struct {
bytes.Buffer
}
func (b *eventBatch) Put(key []byte, value []byte) {
l := uint32(len(key) + len(value) + 1 + 2)
binary.Write(b, binary.BigEndian, l)
b.WriteByte(kTypePutEvent)
keyLen := uint16(len(key))
binary.Write(b, binary.BigEndian, keyLen)
b.Write(key)
b.Write(value)
}
func (b *eventBatch) Delete(key []byte) {
l := uint32(len(key) + 1)
binary.Write(b, binary.BigEndian, l)
b.WriteByte(kTypeDeleteEvent)
b.Write(key)
}
type eventWriter interface {
Put(key []byte, value []byte)
Delete(key []byte)
}
func decodeEventBatch(w eventWriter, data []byte) error {
for {
if len(data) == 0 {
return nil
}
if len(data) < 4 {
return io.ErrUnexpectedEOF
}
l := binary.BigEndian.Uint32(data)
data = data[4:]
if uint32(len(data)) < l {
return io.ErrUnexpectedEOF
}
if err := decodeEvent(w, data[0:l]); err != nil {
return err
}
data = data[l:]
}
}
func decodeEvent(w eventWriter, b []byte) error {
if len(b) == 0 {
return errInvalidEvent
}
switch b[0] {
case kTypePutEvent:
if len(b[1:]) < 2 {
return errInvalidPutEvent
}
keyLen := binary.BigEndian.Uint16(b[1:3])
b = b[3:]
if len(b) < int(keyLen) {
return errInvalidPutEvent
}
w.Put(b[0:keyLen], b[keyLen:])
case kTypeDeleteEvent:
w.Delete(b[1:])
default:
return errInvalidEvent
}
return nil
}
func formatEventKey(buf []byte, k []byte) ([]byte, error) {
if len(k) < 2 {
return nil, errInvalidEvent
}
buf = append(buf, fmt.Sprintf("DB:%2d ", k[0])...)
buf = append(buf, fmt.Sprintf("%s ", TypeName[k[1]])...)
db := new(DB)
db.index = k[0]
//to do format at respective place
switch k[1] {
case KVType:
if key, err := db.decodeKVKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case HashType:
if key, field, err := db.hDecodeHashKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(field))
}
case HSizeType:
if key, err := db.hDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case ListType:
if key, seq, err := db.lDecodeListKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, int64(seq), 10)
}
case LMetaType:
if key, err := db.lDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case ZSetType:
if key, m, err := db.zDecodeSetKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(m))
}
case ZSizeType:
if key, err := db.zDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case ZScoreType:
if key, m, score, err := db.zDecodeScoreKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(m))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, score, 10)
}
case BitType:
if key, seq, err := db.bDecodeBinKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendUint(buf, uint64(seq), 10)
}
case BitMetaType:
if key, err := db.bDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case SetType:
if key, member, err := db.sDecodeSetKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(member))
}
case SSizeType:
if key, err := db.sDecodeSizeKey(k); err != nil {
return nil, err
} else {
buf = strconv.AppendQuote(buf, hack.String(key))
}
case ExpTimeType:
if tp, key, t, err := db.expDecodeTimeKey(k); err != nil {
return nil, err
} else {
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, t, 10)
}
case ExpMetaType:
if tp, key, err := db.expDecodeMetaKey(k); err != nil {
return nil, err
} else {
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(key))
}
default:
return nil, errInvalidEvent
}
return buf, nil
}

56
ledis/event_test.go Normal file
View File

@ -0,0 +1,56 @@
package ledis
import (
"reflect"
"testing"
)
type testEvent struct {
Key []byte
Value []byte
}
type testEventWriter struct {
evs []testEvent
}
func (w *testEventWriter) Put(key []byte, value []byte) {
e := testEvent{key, value}
w.evs = append(w.evs, e)
}
func (w *testEventWriter) Delete(key []byte) {
e := testEvent{key, nil}
w.evs = append(w.evs, e)
}
func TestEvent(t *testing.T) {
k1 := []byte("k1")
v1 := []byte("v1")
k2 := []byte("k2")
k3 := []byte("k3")
v3 := []byte("v3")
b := new(eventBatch)
b.Put(k1, v1)
b.Delete(k2)
b.Put(k3, v3)
buf := b.Bytes()
w := &testEventWriter{}
ev2 := &testEventWriter{
evs: []testEvent{
testEvent{k1, v1},
testEvent{k2, nil},
testEvent{k3, v3}},
}
if err := decodeEventBatch(w, buf); err != nil {
t.Fatal(err)
} else if !reflect.DeepEqual(w, ev2) {
t.Fatal("not equal")
}
}

160
ledis/ledis.go
View File

@ -2,9 +2,14 @@ package ledis
import (
"fmt"
"github.com/siddontang/go-log/log"
"github.com/siddontang/go/filelock"
"github.com/siddontang/go/log"
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/rpl"
"github.com/siddontang/ledisdb/store"
"io"
"os"
"path"
"sync"
"time"
)
@ -16,59 +21,93 @@ type Ledis struct {
dbs [MaxDBNumber]*DB
quit chan struct{}
jobs *sync.WaitGroup
wg sync.WaitGroup
binlog *BinLog
//for replication
r *rpl.Replication
rc chan struct{}
rbatch store.WriteBatch
rwg sync.WaitGroup
rhs []NewLogEventHandler
wLock sync.RWMutex //allow one write at same time
commitLock sync.Mutex //allow one write commit at same time
// for readonly mode, only replication and flushall can write
readOnly bool
lock io.Closer
}
func Open(cfg *config.Config) (*Ledis, error) {
return Open2(cfg, RDWRMode)
}
func Open2(cfg *config.Config, flags int) (*Ledis, error) {
if len(cfg.DataDir) == 0 {
cfg.DataDir = config.DefaultDataDir
}
ldb, err := store.Open(cfg)
if err != nil {
return nil, err
}
os.MkdirAll(cfg.DataDir, 0755)
var err error
l := new(Ledis)
l.quit = make(chan struct{})
l.jobs = new(sync.WaitGroup)
l.ldb = ldb
if cfg.BinLog.MaxFileNum > 0 && cfg.BinLog.MaxFileSize > 0 {
println("binlog will be refactored later, use your own risk!!!")
l.binlog, err = NewBinLog(cfg)
if err != nil {
if l.lock, err = filelock.Lock(path.Join(cfg.DataDir, "LOCK")); err != nil {
return nil, err
}
l.readOnly = (flags&ROnlyMode > 0)
l.quit = make(chan struct{})
if l.ldb, err = store.Open(cfg); err != nil {
return nil, err
}
if cfg.UseReplication {
if l.r, err = rpl.NewReplication(cfg); err != nil {
return nil, err
}
l.rc = make(chan struct{}, 8)
l.rbatch = l.ldb.NewWriteBatch()
l.wg.Add(1)
go l.onReplication()
//first we must try wait all replication ok
//maybe some logs are not committed
l.WaitReplication()
} else {
l.binlog = nil
l.r = nil
}
for i := uint8(0); i < MaxDBNumber; i++ {
l.dbs[i] = l.newDB(i)
}
l.activeExpireCycle()
l.wg.Add(1)
go l.onDataExpired()
return l, nil
}
func (l *Ledis) Close() {
close(l.quit)
l.jobs.Wait()
l.wg.Wait()
l.ldb.Close()
if l.binlog != nil {
l.binlog.Close()
l.binlog = nil
if l.r != nil {
l.r.Close()
l.r = nil
}
if l.lock != nil {
l.lock.Close()
l.lock = nil
}
}
@ -80,35 +119,84 @@ func (l *Ledis) Select(index int) (*DB, error) {
return l.dbs[index], nil
}
// Flush All will clear all data and replication logs
func (l *Ledis) FlushAll() error {
for index, db := range l.dbs {
if _, err := db.FlushAll(); err != nil {
log.Error("flush db %d error %s", index, err.Error())
l.wLock.Lock()
defer l.wLock.Unlock()
return l.flushAll()
}
func (l *Ledis) flushAll() error {
it := l.ldb.NewIterator()
defer it.Close()
w := l.ldb.NewWriteBatch()
defer w.Rollback()
n := 0
for ; it.Valid(); it.Next() {
n++
if n == 10000 {
if err := w.Commit(); err != nil {
log.Fatal("flush all commit error: %s", err.Error())
return err
}
n = 0
}
w.Delete(it.RawKey())
}
if err := w.Commit(); err != nil {
log.Fatal("flush all commit error: %s", err.Error())
return err
}
if l.r != nil {
if err := l.r.Clear(); err != nil {
log.Fatal("flush all replication clear error: %s", err.Error())
return err
}
}
return nil
}
// very dangerous to use
func (l *Ledis) DataDB() *store.DB {
return l.ldb
func (l *Ledis) IsReadOnly() bool {
if l.readOnly {
return true
} else if l.r != nil {
if b, _ := l.r.CommitIDBehind(); b {
return true
}
}
return false
}
func (l *Ledis) activeExpireCycle() {
func (l *Ledis) SetReadOnly(b bool) {
l.readOnly = b
}
func (l *Ledis) onDataExpired() {
defer l.wg.Done()
var executors []*elimination = make([]*elimination, len(l.dbs))
for i, db := range l.dbs {
executors[i] = db.newEliminator()
}
l.jobs.Add(1)
go func() {
tick := time.NewTicker(1 * time.Second)
end := false
defer tick.Stop()
done := make(chan struct{})
for !end {
for {
select {
case <-tick.C:
if l.IsReadOnly() {
break
}
go func() {
for _, eli := range executors {
eli.active()
@ -117,12 +205,8 @@ func (l *Ledis) activeExpireCycle() {
}()
<-done
case <-l.quit:
end = true
break
return
}
}
tick.Stop()
l.jobs.Done()
}()
}

15
ledis/ledis_db.go
View File

@ -109,21 +109,6 @@ func (db *DB) newEliminator() *elimination {
return eliminator
}
func (db *DB) flushRegion(t *batch, minKey []byte, maxKey []byte) (drop int64, err error) {
it := db.bucket.RangeIterator(minKey, maxKey, store.RangeROpen)
for ; it.Valid(); it.Next() {
t.Delete(it.RawKey())
drop++
if drop&1023 == 0 {
if err = t.Commit(); err != nil {
return
}
}
}
it.Close()
return
}
func (db *DB) flushType(t *batch, dataType byte) (drop int64, err error) {
var deleteFunc func(t *batch, key []byte) int64
var metaDataType byte

2
ledis/ledis_test.go
View File

@ -14,8 +14,6 @@ func getTestDB() *DB {
f := func() {
cfg := new(config.Config)
cfg.DataDir = "/tmp/test_ledis"
// cfg.BinLog.MaxFileSize = 1073741824
// cfg.BinLog.MaxFileNum = 3
os.RemoveAll(cfg.DataDir)

425
ledis/replication.go
View File

@ -1,114 +1,121 @@
package ledis
import (
"bufio"
"bytes"
"errors"
"github.com/siddontang/go-log/log"
"github.com/siddontang/ledisdb/store/driver"
"github.com/siddontang/go/log"
"github.com/siddontang/go/snappy"
"github.com/siddontang/ledisdb/rpl"
"io"
"os"
"time"
)
const (
maxReplBatchNum = 100
maxReplLogSize = 1 * 1024 * 1024
)
var (
ErrSkipEvent = errors.New("skip to next event")
ErrLogMissed = errors.New("log is pured in server")
)
var (
errInvalidBinLogEvent = errors.New("invalid binglog event")
errInvalidBinLogFile = errors.New("invalid binlog file")
)
type replBatch struct {
wb driver.IWriteBatch
events [][]byte
l *Ledis
lastHead *BinLogHead
func (l *Ledis) ReplicationUsed() bool {
return l.r != nil
}
func (b *replBatch) Commit() error {
b.l.commitLock.Lock()
defer b.l.commitLock.Unlock()
func (l *Ledis) handleReplication() error {
l.wLock.Lock()
defer l.wLock.Unlock()
err := b.wb.Commit()
if err != nil {
b.Rollback()
return err
}
if b.l.binlog != nil {
if err = b.l.binlog.Log(b.events...); err != nil {
b.Rollback()
return err
}
}
b.events = [][]byte{}
b.lastHead = nil
return nil
}
func (b *replBatch) Rollback() error {
b.wb.Rollback()
b.events = [][]byte{}
b.lastHead = nil
return nil
}
func (l *Ledis) replicateEvent(b *replBatch, event []byte) error {
if len(event) == 0 {
return errInvalidBinLogEvent
}
b.events = append(b.events, event)
logType := uint8(event[0])
switch logType {
case BinLogTypePut:
return l.replicatePutEvent(b, event)
case BinLogTypeDeletion:
return l.replicateDeleteEvent(b, event)
default:
return errInvalidBinLogEvent
}
}
func (l *Ledis) replicatePutEvent(b *replBatch, event []byte) error {
key, value, err := decodeBinLogPut(event)
if err != nil {
return err
}
b.wb.Put(key, value)
return nil
}
func (l *Ledis) replicateDeleteEvent(b *replBatch, event []byte) error {
key, err := decodeBinLogDelete(event)
if err != nil {
return err
}
b.wb.Delete(key)
return nil
}
func ReadEventFromReader(rb io.Reader, f func(head *BinLogHead, event []byte) error) error {
head := &BinLogHead{}
l.rwg.Add(1)
rl := &rpl.Log{}
var err error
for {
if err = l.r.NextNeedCommitLog(rl); err != nil {
if err != rpl.ErrNoBehindLog {
log.Error("get next commit log err, %s", err.Error)
return err
} else {
l.rwg.Done()
return nil
}
} else {
l.rbatch.Rollback()
if rl.Compression == 1 {
//todo optimize
if rl.Data, err = snappy.Decode(nil, rl.Data); err != nil {
log.Error("decode log error %s", err.Error())
return err
}
}
decodeEventBatch(l.rbatch, rl.Data)
l.commitLock.Lock()
if err = l.rbatch.Commit(); err != nil {
log.Error("commit log error %s", err.Error())
} else if err = l.r.UpdateCommitID(rl.ID); err != nil {
log.Error("update commit id error %s", err.Error())
}
l.commitLock.Unlock()
if err != nil {
return err
}
}
}
}
func (l *Ledis) onReplication() {
defer l.wg.Done()
AsyncNotify(l.rc)
for {
if err = head.Read(rb); err != nil {
select {
case <-l.rc:
l.handleReplication()
case <-l.quit:
return
}
}
}
func (l *Ledis) WaitReplication() error {
if !l.ReplicationUsed() {
return ErrRplNotSupport
}
l.noticeReplication()
l.rwg.Wait()
for i := 0; i < 100; i++ {
b, err := l.r.CommitIDBehind()
if err != nil {
return err
} else if b {
l.noticeReplication()
l.rwg.Wait()
} else {
return nil
}
}
return errors.New("wait replication too many times")
}
func (l *Ledis) StoreLogsFromReader(rb io.Reader) error {
if !l.ReplicationUsed() {
return ErrRplNotSupport
} else if !l.readOnly {
return ErrRplInRDWR
}
log := &rpl.Log{}
for {
if err := log.Decode(rb); err != nil {
if err == io.EOF {
break
} else {
@ -116,196 +123,114 @@ func ReadEventFromReader(rb io.Reader, f func(head *BinLogHead, event []byte) er
}
}
var dataBuf bytes.Buffer
if _, err = io.CopyN(&dataBuf, rb, int64(head.PayloadLen)); err != nil {
if err := l.r.StoreLog(log); err != nil {
return err
}
err = f(head, dataBuf.Bytes())
if err != nil && err != ErrSkipEvent {
return err
}
}
l.noticeReplication()
return nil
}
func (l *Ledis) ReplicateFromReader(rb io.Reader) error {
b := new(replBatch)
b.wb = l.ldb.NewWriteBatch()
b.l = l
f := func(head *BinLogHead, event []byte) error {
if b.lastHead == nil {
b.lastHead = head
} else if !b.lastHead.InSameBatch(head) {
if err := b.Commit(); err != nil {
log.Fatal("replication error %s, skip to next", err.Error())
return ErrSkipEvent
}
b.lastHead = head
}
err := l.replicateEvent(b, event)
if err != nil {
log.Fatal("replication error %s, skip to next", err.Error())
return ErrSkipEvent
}
return nil
}
err := ReadEventFromReader(rb, f)
if err != nil {
b.Rollback()
return err
}
return b.Commit()
func (l *Ledis) noticeReplication() {
AsyncNotify(l.rc)
}
func (l *Ledis) ReplicateFromData(data []byte) error {
func (l *Ledis) StoreLogsFromData(data []byte) error {
rb := bytes.NewReader(data)
err := l.ReplicateFromReader(rb)
return err
return l.StoreLogsFromReader(rb)
}
func (l *Ledis) ReplicateFromBinLog(filePath string) error {
f, err := os.Open(filePath)
if err != nil {
return err
func (l *Ledis) ReadLogsTo(startLogID uint64, w io.Writer) (n int, nextLogID uint64, err error) {
if !l.ReplicationUsed() {
// no replication log
nextLogID = 0
err = ErrRplNotSupport
return
}
rb := bufio.NewReaderSize(f, 4096)
var firtID, lastID uint64
err = l.ReplicateFromReader(rb)
firtID, err = l.r.FirstLogID()
if err != nil {
return
}
f.Close()
if startLogID < firtID {
err = ErrLogMissed
return
}
return err
lastID, err = l.r.LastLogID()
if err != nil {
return
}
nextLogID = startLogID
log := &rpl.Log{}
for i := startLogID; i <= lastID; i++ {
if err = l.r.GetLog(i, log); err != nil {
return
}
if err = log.Encode(w); err != nil {
return
}
nextLogID = i + 1
n += log.Size()
if n > maxReplLogSize {
break
}
}
return
}
// try to read events, if no events read, try to wait the new event singal until timeout seconds
func (l *Ledis) ReadEventsToTimeout(info *BinLogAnchor, w io.Writer, timeout int) (n int, err error) {
lastIndex := info.LogFileIndex
lastPos := info.LogPos
n = 0
if l.binlog == nil {
//binlog not supported
info.LogFileIndex = 0
info.LogPos = 0
func (l *Ledis) ReadLogsToTimeout(startLogID uint64, w io.Writer, timeout int) (n int, nextLogID uint64, err error) {
n, nextLogID, err = l.ReadLogsTo(startLogID, w)
if err != nil {
return
} else if n != 0 {
return
}
n, err = l.ReadEventsTo(info, w)
if err == nil && info.LogFileIndex == lastIndex && info.LogPos == lastPos {
//no events read
select {
case <-l.binlog.Wait():
case <-l.r.WaitLog():
case <-time.After(time.Duration(timeout) * time.Second):
}
return l.ReadEventsTo(info, w)
}
return
return l.ReadLogsTo(startLogID, w)
}
func (l *Ledis) ReadEventsTo(info *BinLogAnchor, w io.Writer) (n int, err error) {
n = 0
if l.binlog == nil {
//binlog not supported
info.LogFileIndex = 0
info.LogPos = 0
return
func (l *Ledis) propagate(rl *rpl.Log) {
for _, h := range l.rhs {
h(rl)
}
index := info.LogFileIndex
offset := info.LogPos
filePath := l.binlog.FormatLogFilePath(index)
var f *os.File
f, err = os.Open(filePath)
if os.IsNotExist(err) {
lastIndex := l.binlog.LogFileIndex()
if index == lastIndex {
//no binlog at all
info.LogPos = 0
} else {
//slave binlog info had lost
info.LogFileIndex = -1
}
}
if err != nil {
if os.IsNotExist(err) {
err = nil
}
return
}
defer f.Close()
var fileSize int64
st, _ := f.Stat()
fileSize = st.Size()
if fileSize == info.LogPos {
return
}
if _, err = f.Seek(offset, os.SEEK_SET); err != nil {
//may be invliad seek offset
return
}
var lastHead *BinLogHead = nil
head := &BinLogHead{}
batchNum := 0
for {
if err = head.Read(f); err != nil {
if err == io.EOF {
//we will try to use next binlog
if index < l.binlog.LogFileIndex() {
info.LogFileIndex += 1
info.LogPos = 0
}
err = nil
return
} else {
return
}
}
if lastHead == nil {
lastHead = head
batchNum++
} else if !lastHead.InSameBatch(head) {
lastHead = head
batchNum++
if batchNum > maxReplBatchNum || n > maxReplLogSize {
return
}
}
if err = head.Write(w); err != nil {
return
}
if _, err = io.CopyN(w, f, int64(head.PayloadLen)); err != nil {
return
}
n += (head.Len() + int(head.PayloadLen))
info.LogPos = info.LogPos + int64(head.Len()) + int64(head.PayloadLen)
}
return
}
type NewLogEventHandler func(rl *rpl.Log)
func (l *Ledis) AddNewLogEventHandler(h NewLogEventHandler) error {
if !l.ReplicationUsed() {
return ErrRplNotSupport
}
l.rhs = append(l.rhs, h)
return nil
}
func (l *Ledis) ReplicationStat() (*rpl.Stat, error) {
if !l.ReplicationUsed() {
return nil, ErrRplNotSupport
}
return l.r.Stat()
}

55
ledis/replication_test.go
View File

@ -6,7 +6,6 @@ import (
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/store"
"os"
"path"
"testing"
)
@ -34,8 +33,8 @@ func TestReplication(t *testing.T) {
cfgM := new(config.Config)
cfgM.DataDir = "/tmp/test_repl/master"
cfgM.BinLog.MaxFileNum = 10
cfgM.BinLog.MaxFileSize = 50
cfgM.UseReplication = true
cfgM.Replication.Compression = true
os.RemoveAll(cfgM.DataDir)
@ -46,10 +45,11 @@ func TestReplication(t *testing.T) {
cfgS := new(config.Config)
cfgS.DataDir = "/tmp/test_repl/slave"
cfgS.UseReplication = true
os.RemoveAll(cfgS.DataDir)
slave, err = Open(cfgS)
slave, err = Open2(cfgS, ROnlyMode)
if err != nil {
t.Fatal(err)
}
@ -59,16 +59,9 @@ func TestReplication(t *testing.T) {
db.Set([]byte("b"), []byte("value"))
db.Set([]byte("c"), []byte("value"))
if tx, err := db.Begin(); err == nil {
tx.HSet([]byte("a"), []byte("1"), []byte("value"))
tx.HSet([]byte("b"), []byte("2"), []byte("value"))
tx.HSet([]byte("c"), []byte("3"), []byte("value"))
tx.Commit()
} else {
db.HSet([]byte("a"), []byte("1"), []byte("value"))
db.HSet([]byte("b"), []byte("2"), []byte("value"))
db.HSet([]byte("c"), []byte("3"), []byte("value"))
}
m, _ := db.Multi()
m.Set([]byte("a1"), []byte("value"))
@ -76,19 +69,6 @@ func TestReplication(t *testing.T) {
m.Set([]byte("c1"), []byte("value"))
m.Close()
for _, name := range master.binlog.LogNames() {
p := path.Join(master.binlog.LogPath(), name)
err = slave.ReplicateFromBinLog(p)
if err != nil {
t.Fatal(err)
}
}
if err = checkLedisEqual(master, slave); err != nil {
t.Fatal(err)
}
slave.FlushAll()
db.Set([]byte("a1"), []byte("value"))
@ -99,37 +79,24 @@ func TestReplication(t *testing.T) {
db.HSet([]byte("b1"), []byte("2"), []byte("value"))
db.HSet([]byte("c1"), []byte("3"), []byte("value"))
if tx, err := db.Begin(); err == nil {
tx.HSet([]byte("a1"), []byte("1"), []byte("value1"))
tx.HSet([]byte("b1"), []byte("2"), []byte("value1"))
tx.HSet([]byte("c1"), []byte("3"), []byte("value1"))
tx.Rollback()
}
info := new(BinLogAnchor)
info.LogFileIndex = 1
info.LogPos = 0
var buf bytes.Buffer
var n int
var id uint64 = 1
for {
buf.Reset()
n, err = master.ReadEventsTo(info, &buf)
n, id, err = master.ReadLogsTo(id, &buf)
if err != nil {
t.Fatal(err)
} else if info.LogFileIndex == -1 {
t.Fatal("invalid log file index -1")
} else if info.LogFileIndex == 0 {
t.Fatal("invalid log file index 0")
} else {
if err = slave.ReplicateFromReader(&buf); err != nil {
} else if n != 0 {
if err = slave.StoreLogsFromReader(&buf); err != nil {
t.Fatal(err)
}
if n == 0 {
} else if n == 0 {
break
}
}
}
slave.WaitReplication()
if err = checkLedisEqual(master, slave); err != nil {
t.Fatal(err)

20
ledis/scan.go
View File

@ -24,17 +24,17 @@ func (db *DB) scan(dataType byte, key []byte, count int, inclusive bool, match s
if err = checkKeySize(key); err != nil {
return nil, err
}
if minKey, err = db.encodeMetaKey(dataType, key); err != nil {
if minKey, err = db.encodeScanKey(dataType, key); err != nil {
return nil, err
}
} else {
if minKey, err = db.encodeMinKey(dataType); err != nil {
if minKey, err = db.encodeScanMinKey(dataType); err != nil {
return nil, err
}
}
if maxKey, err = db.encodeMaxKey(dataType); err != nil {
if maxKey, err = db.encodeScanMaxKey(dataType); err != nil {
return nil, err
}
@ -54,7 +54,7 @@ func (db *DB) scan(dataType byte, key []byte, count int, inclusive bool, match s
}
for i := 0; it.Valid() && i < count && bytes.Compare(it.RawKey(), maxKey) < 0; it.Next() {
if k, err := db.decodeMetaKey(dataType, it.Key()); err != nil {
if k, err := db.decodeScanKey(dataType, it.Key()); err != nil {
continue
} else if r != nil && !r.Match(k) {
continue
@ -67,12 +67,12 @@ func (db *DB) scan(dataType byte, key []byte, count int, inclusive bool, match s
return v, nil
}
func (db *DB) encodeMinKey(dataType byte) ([]byte, error) {
return db.encodeMetaKey(dataType, nil)
func (db *DB) encodeScanMinKey(dataType byte) ([]byte, error) {
return db.encodeScanKey(dataType, nil)
}
func (db *DB) encodeMaxKey(dataType byte) ([]byte, error) {
k, err := db.encodeMetaKey(dataType, nil)
func (db *DB) encodeScanMaxKey(dataType byte) ([]byte, error) {
k, err := db.encodeScanKey(dataType, nil)
if err != nil {
return nil, err
}
@ -80,7 +80,7 @@ func (db *DB) encodeMaxKey(dataType byte) ([]byte, error) {
return k, nil
}
func (db *DB) encodeMetaKey(dataType byte, key []byte) ([]byte, error) {
func (db *DB) encodeScanKey(dataType byte, key []byte) ([]byte, error) {
switch dataType {
case KVType:
return db.encodeKVKey(key), nil
@ -98,7 +98,7 @@ func (db *DB) encodeMetaKey(dataType byte, key []byte) ([]byte, error) {
return nil, errDataType
}
}
func (db *DB) decodeMetaKey(dataType byte, ek []byte) ([]byte, error) {
func (db *DB) decodeScanKey(dataType byte, ek []byte) ([]byte, error) {
if len(ek) < 2 || ek[0] != db.index || ek[1] != dataType {
return nil, errMetaKey
}

7
ledis/t_bit.go
View File

@ -3,6 +3,7 @@ package ledis
import (
"encoding/binary"
"errors"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/store"
"sort"
"time"
@ -239,8 +240,8 @@ func (db *DB) bUpdateMeta(t *batch, key []byte, seq uint32, off uint32) (tailSeq
} else if tseq < 0 {
update = true
} else {
tailSeq = uint32(MaxInt32(tseq, 0))
tailOff = uint32(MaxInt32(toff, 0))
tailSeq = uint32(num.MaxInt32(tseq, 0))
tailOff = uint32(num.MaxInt32(toff, 0))
update = (seq > tailSeq || (seq == tailSeq && off > tailOff))
}
@ -461,7 +462,7 @@ func (db *DB) BGet(key []byte) (data []byte, err error) {
}
s = seq << segByteWidth
e = MinUInt32(s+segByteSize, capByteSize)
e = num.MinUint32(s+segByteSize, capByteSize)
copy(data[s:e], it.RawValue())
}
it.Close()

5
ledis/t_hash.go
View File

@ -3,6 +3,7 @@ package ledis
import (
"encoding/binary"
"errors"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/store"
"time"
)
@ -183,8 +184,6 @@ func (db *DB) HSet(key []byte, field []byte, value []byte) (int64, error) {
return 0, err
}
//todo add binlog
err = t.Commit()
return n, err
}
@ -334,7 +333,7 @@ func (db *DB) HIncrBy(key []byte, field []byte, delta int64) (int64, error) {
n += delta
_, err = db.hSetItem(key, field, StrPutInt64(n))
_, err = db.hSetItem(key, field, num.FormatInt64ToSlice(n))
if err != nil {
return 0, err
}

9
ledis/t_kv.go
View File

@ -2,6 +2,7 @@ package ledis
import (
"errors"
"github.com/siddontang/go/num"
"time"
)
@ -75,9 +76,7 @@ func (db *DB) incr(key []byte, delta int64) (int64, error) {
n += delta
t.Put(key, StrPutInt64(n))
//todo binlog
t.Put(key, num.FormatInt64ToSlice(n))
err = t.Commit()
return n, err
@ -185,7 +184,6 @@ func (db *DB) GetSet(key []byte, value []byte) ([]byte, error) {
}
t.Put(key, value)
//todo, binlog
err = t.Commit()
@ -244,7 +242,6 @@ func (db *DB) MSet(args ...KVPair) error {
t.Put(key, value)
//todo binlog
}
err = t.Commit()
@ -297,8 +294,6 @@ func (db *DB) SetNX(key []byte, value []byte) (int64, error) {
} else {
t.Put(key, value)
//todo binlog
err = t.Commit()
}

21
ledis/t_set.go
View File

@ -3,6 +3,7 @@ package ledis
import (
"encoding/binary"
"errors"
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/store"
"time"
)
@ -240,7 +241,7 @@ func (db *DB) sDiffGeneric(keys ...[]byte) ([][]byte, error) {
}
for _, m := range members {
destMap[String(m)] = true
destMap[hack.String(m)] = true
}
for _, k := range keys[1:] {
@ -250,10 +251,10 @@ func (db *DB) sDiffGeneric(keys ...[]byte) ([][]byte, error) {
}
for _, m := range members {
if _, ok := destMap[String(m)]; !ok {
if _, ok := destMap[hack.String(m)]; !ok {
continue
} else if ok {
delete(destMap, String(m))
delete(destMap, hack.String(m))
}
}
// O - A = O, O is zero set.
@ -294,7 +295,7 @@ func (db *DB) sInterGeneric(keys ...[]byte) ([][]byte, error) {
}
for _, m := range members {
destMap[String(m)] = true
destMap[hack.String(m)] = true
}
for _, key := range keys[1:] {
@ -314,8 +315,8 @@ func (db *DB) sInterGeneric(keys ...[]byte) ([][]byte, error) {
if err := checkKeySize(member); err != nil {
return nil, err
}
if _, ok := destMap[String(member)]; ok {
tempMap[String(member)] = true //mark this item as selected
if _, ok := destMap[hack.String(member)]; ok {
tempMap[hack.String(member)] = true //mark this item as selected
}
}
destMap = tempMap //reduce the size of the result set
@ -439,7 +440,7 @@ func (db *DB) sUnionGeneric(keys ...[]byte) ([][]byte, error) {
}
for _, member := range members {
dstMap[String(member)] = true
dstMap[hack.String(member)] = true
}
}
@ -508,14 +509,14 @@ func (db *DB) sStoreGeneric(dstKey []byte, optType byte, keys ...[]byte) (int64,
t.Put(ek, nil)
}
var num = int64(len(v))
var n = int64(len(v))
sk := db.sEncodeSizeKey(dstKey)
t.Put(sk, PutInt64(num))
t.Put(sk, PutInt64(n))
if err = t.Commit(); err != nil {
return 0, err
}
return num, nil
return n, nil
}
func (db *DB) SClear(key []byte) (int64, error) {

16
ledis/t_ttl.go
View File

@ -111,22 +111,6 @@ func (db *DB) rmExpire(t *batch, dataType byte, key []byte) (int64, error) {
}
}
func (db *DB) expFlush(t *batch, dataType byte) (err error) {
minKey := make([]byte, 3)
minKey[0] = db.index
minKey[1] = ExpTimeType
minKey[2] = dataType
maxKey := make([]byte, 3)
maxKey[0] = db.index
maxKey[1] = ExpMetaType
maxKey[2] = dataType + 1
_, err = db.flushRegion(t, minKey, maxKey)
err = t.Commit()
return
}
//////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////

11
ledis/t_ttl_test.go
View File

@ -2,6 +2,7 @@ package ledis
import (
"fmt"
"github.com/siddontang/go/hack"
"sync"
"testing"
"time"
@ -49,7 +50,7 @@ func listAdaptor(db *DB) *adaptor {
adp.set = func(k []byte, v []byte) (int64, error) {
eles := make([][]byte, 0)
for i := 0; i < 3; i++ {
e := []byte(String(v) + fmt.Sprintf("_%d", i))
e := []byte(hack.String(v) + fmt.Sprintf("_%d", i))
eles = append(eles, e)
}
@ -87,8 +88,8 @@ func hashAdaptor(db *DB) *adaptor {
for i := 0; i < 3; i++ {
suffix := fmt.Sprintf("_%d", i)
pair := FVPair{
Field: []byte(String(k) + suffix),
Value: []byte(String(v) + suffix)}
Field: []byte(hack.String(k) + suffix),
Value: []byte(hack.String(v) + suffix)}
datas = append(datas, pair)
}
@ -125,7 +126,7 @@ func zsetAdaptor(db *DB) *adaptor {
adp.set = func(k []byte, v []byte) (int64, error) {
datas := make([]ScorePair, 0)
for i := 0; i < 3; i++ {
memb := []byte(String(k) + fmt.Sprintf("_%d", i))
memb := []byte(hack.String(k) + fmt.Sprintf("_%d", i))
pair := ScorePair{
Score: int64(i),
Member: memb}
@ -165,7 +166,7 @@ func setAdaptor(db *DB) *adaptor {
adp.set = func(k []byte, v []byte) (int64, error) {
eles := make([][]byte, 0)
for i := 0; i < 3; i++ {
e := []byte(String(v) + fmt.Sprintf("_%d", i))
e := []byte(hack.String(v) + fmt.Sprintf("_%d", i))
eles = append(eles, e)
}

29
ledis/t_zset.go
View File

@ -4,6 +4,7 @@ import (
"bytes"
"encoding/binary"
"errors"
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/store"
"time"
)
@ -305,7 +306,6 @@ func (db *DB) ZAdd(key []byte, args ...ScorePair) (int64, error) {
return 0, err
}
//todo add binlog
err := t.Commit()
return num, err
}
@ -834,10 +834,10 @@ func (db *DB) ZUnionStore(destKey []byte, srcKeys [][]byte, weights []int64, agg
return 0, err
}
for _, pair := range scorePairs {
if score, ok := destMap[String(pair.Member)]; !ok {
destMap[String(pair.Member)] = pair.Score * weights[i]
if score, ok := destMap[hack.String(pair.Member)]; !ok {
destMap[hack.String(pair.Member)] = pair.Score * weights[i]
} else {
destMap[String(pair.Member)] = aggregateFunc(score, pair.Score*weights[i])
destMap[hack.String(pair.Member)] = aggregateFunc(score, pair.Score*weights[i])
}
}
}
@ -858,15 +858,14 @@ func (db *DB) ZUnionStore(destKey []byte, srcKeys [][]byte, weights []int64, agg
}
}
var num = int64(len(destMap))
var n = int64(len(destMap))
sk := db.zEncodeSizeKey(destKey)
t.Put(sk, PutInt64(num))
t.Put(sk, PutInt64(n))
//todo add binlog
if err := t.Commit(); err != nil {
return 0, err
}
return num, nil
return n, nil
}
func (db *DB) ZInterStore(destKey []byte, srcKeys [][]byte, weights []int64, aggregate byte) (int64, error) {
@ -895,7 +894,7 @@ func (db *DB) ZInterStore(destKey []byte, srcKeys [][]byte, weights []int64, agg
return 0, err
}
for _, pair := range scorePairs {
destMap[String(pair.Member)] = pair.Score * weights[0]
destMap[hack.String(pair.Member)] = pair.Score * weights[0]
}
for i, key := range srcKeys[1:] {
@ -905,8 +904,8 @@ func (db *DB) ZInterStore(destKey []byte, srcKeys [][]byte, weights []int64, agg
}
tmpMap := map[string]int64{}
for _, pair := range scorePairs {
if score, ok := destMap[String(pair.Member)]; ok {
tmpMap[String(pair.Member)] = aggregateFunc(score, pair.Score*weights[i+1])
if score, ok := destMap[hack.String(pair.Member)]; ok {
tmpMap[hack.String(pair.Member)] = aggregateFunc(score, pair.Score*weights[i+1])
}
}
destMap = tmpMap
@ -927,14 +926,14 @@ func (db *DB) ZInterStore(destKey []byte, srcKeys [][]byte, weights []int64, agg
}
}
var num int64 = int64(len(destMap))
var n int64 = int64(len(destMap))
sk := db.zEncodeSizeKey(destKey)
t.Put(sk, PutInt64(num))
//todo add binlog
t.Put(sk, PutInt64(n))
if err := t.Commit(); err != nil {
return 0, err
}
return num, nil
return n, nil
}
func (db *DB) ZScan(key []byte, count int, inclusive bool, match string) ([][]byte, error) {

15
ledis/tx.go
View File

@ -16,7 +16,7 @@ type Tx struct {
tx *store.Tx
logs [][]byte
eb *eventBatch
}
func (db *DB) IsTransaction() bool {
@ -32,6 +32,8 @@ func (db *DB) Begin() (*Tx, error) {
tx := new(Tx)
tx.eb = new(eventBatch)
tx.DB = new(DB)
tx.DB.l = db.l
@ -67,16 +69,10 @@ func (tx *Tx) Commit() error {
return ErrTxDone
}
tx.l.commitLock.Lock()
err := tx.tx.Commit()
err := tx.l.handleCommit(tx.eb, tx.tx)
tx.tx = nil
if len(tx.logs) > 0 {
tx.l.binlog.Log(tx.logs...)
}
tx.l.commitLock.Unlock()
tx.l.wLock.Unlock()
tx.DB.bucket = nil
@ -90,6 +86,7 @@ func (tx *Tx) Rollback() error {
}
err := tx.tx.Rollback()
tx.eb.Reset()
tx.tx = nil
tx.l.wLock.Unlock()

1
ledis/tx_test.go
View File

@ -195,6 +195,7 @@ func testTx(t *testing.T, name string) {
cfg.DBName = name
cfg.LMDB.MapSize = 10 * 1024 * 1024
cfg.UseReplication = true
os.RemoveAll(cfg.DataDir)

91
ledis/util.go
View File

@ -3,33 +3,16 @@ package ledis
import (
"encoding/binary"
"errors"
"reflect"
"github.com/siddontang/go/hack"
"strconv"
"unsafe"
)
var errIntNumber = errors.New("invalid integer")
// no copy to change slice to string
// use your own risk
func String(b []byte) (s string) {
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pstring := (*reflect.StringHeader)(unsafe.Pointer(&s))
pstring.Data = pbytes.Data
pstring.Len = pbytes.Len
return
}
// no copy to change string to slice
// use your own risk
func Slice(s string) (b []byte) {
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pstring := (*reflect.StringHeader)(unsafe.Pointer(&s))
pbytes.Data = pstring.Data
pbytes.Len = pstring.Len
pbytes.Cap = pstring.Len
return
}
/*
Below I forget why I use little endian to store int.
Maybe I was foolish at that time.
*/
func Int64(v []byte, err error) (int64, error) {
if err != nil {
@ -43,12 +26,21 @@ func Int64(v []byte, err error) (int64, error) {
return int64(binary.LittleEndian.Uint64(v)), nil
}
func Uint64(v []byte, err error) (uint64, error) {
if err != nil {
return 0, err
} else if v == nil || len(v) == 0 {
return 0, nil
} else if len(v) != 8 {
return 0, errIntNumber
}
return binary.LittleEndian.Uint64(v), nil
}
func PutInt64(v int64) []byte {
var b []byte
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pbytes.Data = uintptr(unsafe.Pointer(&v))
pbytes.Len = 8
pbytes.Cap = 8
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, uint64(v))
return b
}
@ -58,7 +50,17 @@ func StrInt64(v []byte, err error) (int64, error) {
} else if v == nil {
return 0, nil
} else {
return strconv.ParseInt(String(v), 10, 64)
return strconv.ParseInt(hack.String(v), 10, 64)
}
}
func StrUint64(v []byte, err error) (uint64, error) {
if err != nil {
return 0, err
} else if v == nil {
return 0, nil
} else {
return strconv.ParseUint(hack.String(v), 10, 64)
}
}
@ -68,7 +70,7 @@ func StrInt32(v []byte, err error) (int32, error) {
} else if v == nil {
return 0, nil
} else {
res, err := strconv.ParseInt(String(v), 10, 32)
res, err := strconv.ParseInt(hack.String(v), 10, 32)
return int32(res), err
}
}
@ -79,35 +81,14 @@ func StrInt8(v []byte, err error) (int8, error) {
} else if v == nil {
return 0, nil
} else {
res, err := strconv.ParseInt(String(v), 10, 8)
res, err := strconv.ParseInt(hack.String(v), 10, 8)
return int8(res), err
}
}
func StrPutInt64(v int64) []byte {
return strconv.AppendInt(nil, v, 10)
}
func MinUInt32(a uint32, b uint32) uint32 {
if a > b {
return b
} else {
return a
}
}
func MaxUInt32(a uint32, b uint32) uint32 {
if a > b {
return a
} else {
return b
}
}
func MaxInt32(a int32, b int32) int32 {
if a > b {
return a
} else {
return b
func AsyncNotify(ch chan struct{}) {
select {
case ch <- struct{}{}:
default:
}
}

242
rpl/file_store.go Normal file
View File

@ -0,0 +1,242 @@
package rpl
import (
"fmt"
"github.com/siddontang/go/log"
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"sync"
)
const (
defaultMaxLogFileSize = 1024 * 1024 * 1024
)
/*
index file format:
ledis-bin.00001
ledis-bin.00002
ledis-bin.00003
*/
type FileStore struct {
LogStore
m sync.Mutex
maxFileSize int
first uint64
last uint64
logFile *os.File
logNames []string
nextLogIndex int64
indexName string
path string
}
func NewFileStore(path string) (*FileStore, error) {
s := new(FileStore)
if err := os.MkdirAll(path, 0755); err != nil {
return nil, err
}
s.path = path
s.maxFileSize = defaultMaxLogFileSize
s.first = 0
s.last = 0
s.logNames = make([]string, 0, 16)
if err := s.loadIndex(); err != nil {
return nil, err
}
return s, nil
}
func (s *FileStore) SetMaxFileSize(size int) {
s.maxFileSize = size
}
func (s *FileStore) GetLog(id uint64, log *Log) error {
panic("not implementation")
return nil
}
func (s *FileStore) SeekLog(id uint64, log *Log) error {
panic("not implementation")
return nil
}
func (s *FileStore) FirstID() (uint64, error) {
panic("not implementation")
return 0, nil
}
func (s *FileStore) LastID() (uint64, error) {
panic("not implementation")
return 0, nil
}
func (s *FileStore) StoreLog(log *Log) error {
panic("not implementation")
return nil
}
func (s *FileStore) StoreLogs(logs []*Log) error {
panic("not implementation")
return nil
}
func (s *FileStore) Purge(n uint64) error {
panic("not implementation")
return nil
}
func (s *FileStore) PuregeExpired(n int64) error {
panic("not implementation")
return nil
}
func (s *FileStore) Clear() error {
panic("not implementation")
return nil
}
func (s *FileStore) Close() error {
panic("not implementation")
return nil
}
func (s *FileStore) flushIndex() error {
data := strings.Join(s.logNames, "\n")
bakName := fmt.Sprintf("%s.bak", s.indexName)
f, err := os.OpenFile(bakName, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Error("create bak index error %s", err.Error())
return err
}
if _, err := f.WriteString(data); err != nil {
log.Error("write index error %s", err.Error())
f.Close()
return err
}
f.Close()
if err := os.Rename(bakName, s.indexName); err != nil {
log.Error("rename bak index error %s", err.Error())
return err
}
return nil
}
func (s *FileStore) fileExists(name string) bool {
p := path.Join(s.path, name)
_, err := os.Stat(p)
return !os.IsNotExist(err)
}
func (s *FileStore) loadIndex() error {
s.indexName = path.Join(s.path, fmt.Sprintf("ledis-bin.index"))
if _, err := os.Stat(s.indexName); os.IsNotExist(err) {
//no index file, nothing to do
} else {
indexData, err := ioutil.ReadFile(s.indexName)
if err != nil {
return err
}
lines := strings.Split(string(indexData), "\n")
for _, line := range lines {
line = strings.Trim(line, "\r\n ")
if len(line) == 0 {
continue
}
if s.fileExists(line) {
s.logNames = append(s.logNames, line)
} else {
log.Info("log %s has not exists", line)
}
}
}
var err error
if len(s.logNames) == 0 {
s.nextLogIndex = 1
} else {
lastName := s.logNames[len(s.logNames)-1]
if s.nextLogIndex, err = strconv.ParseInt(path.Ext(lastName)[1:], 10, 64); err != nil {
log.Error("invalid logfile name %s", err.Error())
return err
}
//like mysql, if server restart, a new log will create
s.nextLogIndex++
}
return nil
}
func (s *FileStore) openNewLogFile() error {
var err error
lastName := s.formatLogFileName(s.nextLogIndex)
logPath := path.Join(s.path, lastName)
if s.logFile, err = os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY, 0644); err != nil {
log.Error("open new logfile error %s", err.Error())
return err
}
s.logNames = append(s.logNames, lastName)
if err = s.flushIndex(); err != nil {
return err
}
return nil
}
func (s *FileStore) checkLogFileSize() bool {
if s.logFile == nil {
return false
}
st, _ := s.logFile.Stat()
if st.Size() >= int64(s.maxFileSize) {
s.closeLog()
return true
}
return false
}
func (s *FileStore) closeLog() {
if s.logFile == nil {
return
}
s.nextLogIndex++
s.logFile.Close()
s.logFile = nil
}
func (s *FileStore) formatLogFileName(index int64) string {
return fmt.Sprintf("ledis-bin.%07d", index)
}

276
rpl/goleveldb_store.go Normal file
View File

@ -0,0 +1,276 @@
package rpl
import (
"bytes"
"fmt"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/store"
"os"
"sync"
"time"
)
type GoLevelDBStore struct {
LogStore
m sync.Mutex
db *store.DB
cfg *config.Config
first uint64
last uint64
}
func (s *GoLevelDBStore) FirstID() (uint64, error) {
s.m.Lock()
id, err := s.firstID()
s.m.Unlock()
return id, err
}
func (s *GoLevelDBStore) LastID() (uint64, error) {
s.m.Lock()
id, err := s.lastID()
s.m.Unlock()
return id, err
}
func (s *GoLevelDBStore) firstID() (uint64, error) {
if s.first != InvalidLogID {
return s.first, nil
}
it := s.db.NewIterator()
defer it.Close()
it.SeekToFirst()
if it.Valid() {
s.first = num.BytesToUint64(it.RawKey())
}
return s.first, nil
}
func (s *GoLevelDBStore) lastID() (uint64, error) {
if s.last != InvalidLogID {
return s.last, nil
}
it := s.db.NewIterator()
defer it.Close()
it.SeekToLast()
if it.Valid() {
s.last = num.BytesToUint64(it.RawKey())
}
return s.last, nil
}
func (s *GoLevelDBStore) GetLog(id uint64, log *Log) error {
v, err := s.db.Get(num.Uint64ToBytes(id))
if err != nil {
return err
} else if v == nil {
return ErrLogNotFound
} else {
return log.Decode(bytes.NewBuffer(v))
}
}
func (s *GoLevelDBStore) SeekLog(id uint64, log *Log) error {
it := s.db.NewIterator()
defer it.Close()
it.Seek(num.Uint64ToBytes(id))
if !it.Valid() {
return ErrLogNotFound
} else {
return log.Decode(bytes.NewBuffer(it.RawValue()))
}
}
func (s *GoLevelDBStore) StoreLog(log *Log) error {
return s.StoreLogs([]*Log{log})
}
func (s *GoLevelDBStore) StoreLogs(logs []*Log) error {
s.m.Lock()
defer s.m.Unlock()
w := s.db.NewWriteBatch()
defer w.Rollback()
last, err := s.lastID()
if err != nil {
return err
}
s.last = InvalidLogID
var buf bytes.Buffer
for _, log := range logs {
buf.Reset()
if log.ID <= last {
return ErrLessLogID
}
last = log.ID
key := num.Uint64ToBytes(log.ID)
if err := log.Encode(&buf); err != nil {
return err
}
w.Put(key, buf.Bytes())
}
if err := w.Commit(); err != nil {
return err
}
s.last = last
return nil
}
func (s *GoLevelDBStore) Purge(n uint64) error {
s.m.Lock()
defer s.m.Unlock()
var first, last uint64
var err error
first, err = s.firstID()
if err != nil {
return err
}
last, err = s.lastID()
if err != nil {
return err
}
start := first
stop := num.MinUint64(last, first+n)
w := s.db.NewWriteBatch()
defer w.Rollback()
s.reset()
for i := start; i < stop; i++ {
w.Delete(num.Uint64ToBytes(i))
}
if err = w.Commit(); err != nil {
return err
}
return nil
}
func (s *GoLevelDBStore) PurgeExpired(n int64) error {
if n <= 0 {
return fmt.Errorf("invalid expired time %d", n)
}
t := uint32(time.Now().Unix() - int64(n))
s.m.Lock()
defer s.m.Unlock()
s.reset()
it := s.db.NewIterator()
it.SeekToFirst()
w := s.db.NewWriteBatch()
defer w.Rollback()
l := new(Log)
for ; it.Valid(); it.Next() {
v := it.RawValue()
if err := l.Unmarshal(v); err != nil {
return err
} else if l.CreateTime > t {
break
} else {
w.Delete(it.RawKey())
}
}
if err := w.Commit(); err != nil {
return err
}
return nil
}
func (s *GoLevelDBStore) Clear() error {
s.m.Lock()
defer s.m.Unlock()
if s.db != nil {
s.db.Close()
}
s.reset()
os.RemoveAll(s.cfg.DBPath)
return s.open()
}
func (s *GoLevelDBStore) reset() {
s.first = InvalidLogID
s.last = InvalidLogID
}
func (s *GoLevelDBStore) Close() error {
s.m.Lock()
defer s.m.Unlock()
if s.db == nil {
return nil
}
err := s.db.Close()
s.db = nil
return err
}
func (s *GoLevelDBStore) open() error {
var err error
s.first = InvalidLogID
s.last = InvalidLogID
s.db, err = store.Open(s.cfg)
return err
}
func NewGoLevelDBStore(base string) (*GoLevelDBStore, error) {
cfg := new(config.Config)
cfg.DBName = "goleveldb"
cfg.DBPath = base
cfg.LevelDB.BlockSize = 4 * 1024 * 1024
cfg.LevelDB.CacheSize = 16 * 1024 * 1024
cfg.LevelDB.WriteBufferSize = 4 * 1024 * 1024
cfg.LevelDB.Compression = false
s := new(GoLevelDBStore)
s.cfg = cfg
if err := s.open(); err != nil {
return nil, err
}
return s, nil
}

102
rpl/log.go Normal file
View File

@ -0,0 +1,102 @@
package rpl
import (
"bytes"
"encoding/binary"
"io"
)
type Log struct {
ID uint64
CreateTime uint32
Compression uint8
Data []byte
}
func (l *Log) HeadSize() int {
return 17
}
func (l *Log) Size() int {
return l.HeadSize() + len(l.Data)
}
func (l *Log) Marshal() ([]byte, error) {
buf := bytes.NewBuffer(make([]byte, l.HeadSize()+len(l.Data)))
buf.Reset()
if err := l.Encode(buf); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func (l *Log) Unmarshal(b []byte) error {
buf := bytes.NewBuffer(b)
return l.Decode(buf)
}
func (l *Log) Encode(w io.Writer) error {
buf := make([]byte, l.HeadSize())
pos := 0
binary.BigEndian.PutUint64(buf[pos:], l.ID)
pos += 8
binary.BigEndian.PutUint32(buf[pos:], l.CreateTime)
pos += 4
buf[pos] = l.Compression
pos++
binary.BigEndian.PutUint32(buf[pos:], uint32(len(l.Data)))
if n, err := w.Write(buf); err != nil {
return err
} else if n != len(buf) {
return io.ErrShortWrite
}
if n, err := w.Write(l.Data); err != nil {
return err
} else if n != len(l.Data) {
return io.ErrShortWrite
}
return nil
}
func (l *Log) Decode(r io.Reader) error {
buf := make([]byte, l.HeadSize())
if _, err := io.ReadFull(r, buf); err != nil {
return err
}
pos := 0
l.ID = binary.BigEndian.Uint64(buf[pos:])
pos += 8
l.CreateTime = binary.BigEndian.Uint32(buf[pos:])
pos += 4
l.Compression = uint8(buf[pos])
pos++
length := binary.BigEndian.Uint32(buf[pos:])
l.Data = l.Data[0:0]
if cap(l.Data) >= int(length) {
l.Data = l.Data[0:length]
} else {
l.Data = make([]byte, length)
}
if _, err := io.ReadFull(r, l.Data); err != nil {
return err
}
return nil
}

39
rpl/log_test.go Normal file
View File

@ -0,0 +1,39 @@
package rpl
import (
"bytes"
"reflect"
"testing"
)
func TestLog(t *testing.T) {
l1 := &Log{ID: 1, CreateTime: 100, Data: []byte("hello world")}
var buf bytes.Buffer
if err := l1.Encode(&buf); err != nil {
t.Fatal(err)
}
l2 := &Log{}
if err := l2.Decode(&buf); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(l1, l2) {
t.Fatal("must equal")
}
if buf, err := l1.Marshal(); err != nil {
t.Fatal(err)
} else {
if err = l2.Unmarshal(buf); err != nil {
t.Fatal(err)
}
}
if !reflect.DeepEqual(l1, l2) {
t.Fatal("must equal")
}
}

274
rpl/rpl.go Normal file
View File

@ -0,0 +1,274 @@
package rpl
import (
"encoding/binary"
"github.com/siddontang/go/log"
"github.com/siddontang/go/snappy"
"github.com/siddontang/ledisdb/config"
"os"
"path"
"sync"
"time"
)
type Stat struct {
FirstID uint64
LastID uint64
CommitID uint64
}
type Replication struct {
m sync.Mutex
cfg *config.Config
s LogStore
commitID uint64
commitLog *os.File
quit chan struct{}
wg sync.WaitGroup
nc chan struct{}
}
func NewReplication(cfg *config.Config) (*Replication, error) {
if len(cfg.Replication.Path) == 0 {
cfg.Replication.Path = path.Join(cfg.DataDir, "rpl")
}
base := cfg.Replication.Path
r := new(Replication)
r.quit = make(chan struct{})
r.nc = make(chan struct{})
r.cfg = cfg
var err error
if r.s, err = NewGoLevelDBStore(path.Join(base, "wal")); err != nil {
return nil, err
}
if r.commitLog, err = os.OpenFile(path.Join(base, "commit.log"), os.O_RDWR|os.O_CREATE, 0644); err != nil {
return nil, err
}
if s, _ := r.commitLog.Stat(); s.Size() == 0 {
r.commitID = 0
} else if err = binary.Read(r.commitLog, binary.BigEndian, &r.commitID); err != nil {
return nil, err
}
go r.onPurgeExpired()
return r, nil
}
func (r *Replication) Close() error {
close(r.quit)
r.wg.Wait()
if r.s != nil {
r.s.Close()
r.s = nil
}
if r.commitLog != nil {
r.commitLog.Close()
r.commitLog = nil
}
return nil
}
func (r *Replication) Log(data []byte) (*Log, error) {
if r.cfg.Replication.Compression {
//todo optimize
var err error
if data, err = snappy.Encode(nil, data); err != nil {
return nil, err
}
}
r.m.Lock()
defer r.m.Unlock()
lastID, err := r.s.LastID()
if err != nil {
return nil, err
}
commitId := r.commitID
if lastID < commitId {
lastID = commitId
}
l := new(Log)
l.ID = lastID + 1
l.CreateTime = uint32(time.Now().Unix())
if r.cfg.Replication.Compression {
l.Compression = 1
} else {
l.Compression = 0
}
l.Data = data
if err = r.s.StoreLog(l); err != nil {
return nil, err
}
close(r.nc)
r.nc = make(chan struct{})
return l, nil
}
func (r *Replication) WaitLog() <-chan struct{} {
return r.nc
}
func (r *Replication) StoreLog(log *Log) error {
return r.StoreLogs([]*Log{log})
}
func (r *Replication) StoreLogs(logs []*Log) error {
r.m.Lock()
defer r.m.Unlock()
return r.s.StoreLogs(logs)
}
func (r *Replication) FirstLogID() (uint64, error) {
r.m.Lock()
defer r.m.Unlock()
id, err := r.s.FirstID()
return id, err
}
func (r *Replication) LastLogID() (uint64, error) {
r.m.Lock()
defer r.m.Unlock()
id, err := r.s.LastID()
return id, err
}
func (r *Replication) LastCommitID() (uint64, error) {
r.m.Lock()
id := r.commitID
r.m.Unlock()
return id, nil
}
func (r *Replication) UpdateCommitID(id uint64) error {
r.m.Lock()
defer r.m.Unlock()
return r.updateCommitID(id)
}
func (r *Replication) Stat() (*Stat, error) {
r.m.Lock()
defer r.m.Unlock()
s := &Stat{}
var err error
if s.FirstID, err = r.s.FirstID(); err != nil {
return nil, err
}
if s.LastID, err = r.s.LastID(); err != nil {
return nil, err
}
s.CommitID = r.commitID
return s, nil
}
func (r *Replication) updateCommitID(id uint64) error {
if _, err := r.commitLog.Seek(0, os.SEEK_SET); err != nil {
return err
}
if err := binary.Write(r.commitLog, binary.BigEndian, id); err != nil {
return err
}
r.commitID = id
return nil
}
func (r *Replication) CommitIDBehind() (bool, error) {
r.m.Lock()
defer r.m.Unlock()
id, err := r.s.LastID()
if err != nil {
return false, err
}
return id > r.commitID, nil
}
func (r *Replication) GetLog(id uint64, log *Log) error {
return r.s.GetLog(id, log)
}
func (r *Replication) NextNeedCommitLog(log *Log) error {
r.m.Lock()
defer r.m.Unlock()
id, err := r.s.LastID()
if err != nil {
return err
}
if id <= r.commitID {
return ErrNoBehindLog
}
return r.s.GetLog(r.commitID+1, log)
}
func (r *Replication) Clear() error {
return r.ClearWithCommitID(0)
}
func (r *Replication) ClearWithCommitID(id uint64) error {
r.m.Lock()
defer r.m.Unlock()
if err := r.s.Clear(); err != nil {
return err
}
return r.updateCommitID(id)
}
func (r *Replication) onPurgeExpired() {
r.wg.Add(1)
defer r.wg.Done()
for {
select {
case <-time.After(1 * time.Hour):
n := (r.cfg.Replication.ExpiredLogDays * 24 * 3600)
r.m.Lock()
if err := r.s.PurgeExpired(int64(n)); err != nil {
log.Error("purge expired log error %s", err.Error())
}
r.m.Unlock()
case <-r.quit:
return
}
}
}

44
rpl/rpl_test.go Normal file
View File

@ -0,0 +1,44 @@
package rpl
import (
"github.com/siddontang/ledisdb/config"
"io/ioutil"
"os"
"testing"
)
func TestReplication(t *testing.T) {
dir, err := ioutil.TempDir("", "rpl")
if err != nil {
t.Fatalf("err: %v ", err)
}
defer os.RemoveAll(dir)
c := new(config.Config)
c.Replication.Path = dir
r, err := NewReplication(c)
if err != nil {
t.Fatal(err)
}
if l1, err := r.Log([]byte("hello world")); err != nil {
t.Fatal(err)
} else if l1.ID != 1 {
t.Fatal(l1.ID)
}
if b, _ := r.CommitIDBehind(); !b {
t.Fatal("must backward")
}
if err := r.UpdateCommitID(1); err != nil {
t.Fatal(err)
}
if b, _ := r.CommitIDBehind(); b {
t.Fatal("must not backward")
}
r.Close()
}

40
rpl/store.go Normal file
View File

@ -0,0 +1,40 @@
package rpl
import (
"errors"
)
const (
InvalidLogID uint64 = 0
)
var (
ErrLogNotFound = errors.New("log not found")
ErrLessLogID = errors.New("log id is less")
ErrNoBehindLog = errors.New("no behind commit log")
)
type LogStore interface {
GetLog(id uint64, log *Log) error
// Get the first log which ID is equal or larger than id
SeekLog(id uint64, log *Log) error
FirstID() (uint64, error)
LastID() (uint64, error)
// if log id is less than current last id, return error
StoreLog(log *Log) error
StoreLogs(logs []*Log) error
// Delete first n logs
Purge(n uint64) error
// Delete logs before n seconds
PurgeExpired(n int64) error
// Clear all logs
Clear() error
Close() error
}

189
rpl/store_test.go Normal file
View File

@ -0,0 +1,189 @@
package rpl
import (
"io/ioutil"
"os"
"testing"
"time"
)
func TestGoLevelDBStore(t *testing.T) {
// Create a test dir
dir, err := ioutil.TempDir("", "wal")
if err != nil {
t.Fatalf("err: %v ", err)
}
defer os.RemoveAll(dir)
// New level
l, err := NewGoLevelDBStore(dir)
if err != nil {
t.Fatalf("err: %v ", err)
}
defer l.Close()
testLogs(t, l)
}
func testLogs(t *testing.T, l LogStore) {
// Should be no first index
idx, err := l.FirstID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
// Should be no last index
idx, err = l.LastID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
// Try a filed fetch
var out Log
if err := l.GetLog(10, &out); err.Error() != "log not found" {
t.Fatalf("err: %v ", err)
}
// Write out a log
log := Log{
ID: 1,
Data: []byte("first"),
}
for i := 1; i <= 10; i++ {
log.ID = uint64(i)
if err := l.StoreLog(&log); err != nil {
t.Fatalf("err: %v", err)
}
}
// Attempt to write multiple logs
var logs []*Log
for i := 11; i <= 20; i++ {
nl := &Log{
ID: uint64(i),
Data: []byte("first"),
}
logs = append(logs, nl)
}
if err := l.StoreLogs(logs); err != nil {
t.Fatalf("err: %v", err)
}
// Try to fetch
if err := l.GetLog(10, &out); err != nil {
t.Fatalf("err: %v ", err)
}
// Try to fetch
if err := l.GetLog(20, &out); err != nil {
t.Fatalf("err: %v ", err)
}
// Check the lowest index
idx, err = l.FirstID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 1 {
t.Fatalf("bad idx: %d", idx)
}
// Check the highest index
idx, err = l.LastID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 20 {
t.Fatalf("bad idx: %d", idx)
}
// Delete a suffix
if err := l.Purge(5); err != nil {
t.Fatalf("err: %v ", err)
}
// Verify they are all deleted
for i := 1; i <= 5; i++ {
if err := l.GetLog(uint64(i), &out); err != ErrLogNotFound {
t.Fatalf("err: %v ", err)
}
}
// Index should be one
idx, err = l.FirstID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 6 {
t.Fatalf("bad idx: %d", idx)
}
idx, err = l.LastID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 20 {
t.Fatalf("bad idx: %d", idx)
}
// Should not be able to fetch
if err := l.GetLog(5, &out); err != ErrLogNotFound {
t.Fatalf("err: %v ", err)
}
if err := l.Clear(); err != nil {
t.Fatal(err)
}
idx, err = l.FirstID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
idx, err = l.LastID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
now := uint32(time.Now().Unix())
logs = []*Log{}
for i := 1; i <= 20; i++ {
nl := &Log{
ID: uint64(i),
CreateTime: now - 20,
Data: []byte("first"),
}
logs = append(logs, nl)
}
if err := l.PurgeExpired(1); err != nil {
t.Fatal(err)
}
idx, err = l.FirstID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
idx, err = l.LastID()
if err != nil {
t.Fatalf("err: %v ", err)
}
if idx != 0 {
t.Fatalf("bad idx: %d", idx)
}
}

2
server/accesslog.go
View File

@ -1,7 +1,7 @@
package server
import (
"github.com/siddontang/go-log/log"
"github.com/siddontang/go/log"
)
const (

19
server/app.go
View File

@ -7,6 +7,7 @@ import (
"net/http"
"path"
"strings"
"sync"
)
type App struct {
@ -29,6 +30,10 @@ type App struct {
info *info
s *script
// handle slaves
slock sync.Mutex
slaves map[*client]struct{}
}
func netType(s string) string {
@ -53,6 +58,8 @@ func NewApp(cfg *config.Config) (*App, error) {
app.cfg = cfg
app.slaves = make(map[*client]struct{})
var err error
if app.info, err = newInfo(app); err != nil {
@ -81,7 +88,13 @@ func NewApp(cfg *config.Config) (*App, error) {
}
}
if app.ldb, err = ledis.Open(cfg); err != nil {
flag := ledis.RDWRMode
if len(app.cfg.SlaveOf) > 0 {
//slave must readonly
flag = ledis.ROnlyMode
}
if app.ldb, err = ledis.Open2(cfg, flag); err != nil {
return nil, err
}
@ -89,6 +102,8 @@ func NewApp(cfg *config.Config) (*App, error) {
app.openScript()
app.ldb.AddNewLogEventHandler(app.publishNewLog)
return app, nil
}
@ -120,7 +135,7 @@ func (app *App) Close() {
func (app *App) Run() {
if len(app.cfg.SlaveOf) > 0 {
app.slaveof(app.cfg.SlaveOf)
app.slaveof(app.cfg.SlaveOf, false)
}
go app.httpServe()

12
server/client.go
View File

@ -43,6 +43,11 @@ type responseWriter interface {
flush()
}
type syncAck struct {
id uint64
ch chan uint64
}
type client struct {
app *App
ldb *ledis.Ledis
@ -56,13 +61,17 @@ type client struct {
resp responseWriter
syncBuf bytes.Buffer
compressBuf []byte
lastLogID uint64
ack *syncAck
reqErr chan error
buf bytes.Buffer
tx *ledis.Tx
script *ledis.Multi
}
@ -73,7 +82,6 @@ func newClient(app *App) *client {
c.ldb = app.ldb
c.db, _ = app.ldb.Select(0) //use default db
c.compressBuf = []byte{}
c.reqErr = make(chan error)
return c

15
server/client_http.go
View File

@ -3,8 +3,9 @@ package server
import (
"encoding/json"
"fmt"
"github.com/siddontang/go-bson/bson"
"github.com/siddontang/go-log/log"
"github.com/siddontang/go/bson"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/log"
"github.com/siddontang/ledisdb/ledis"
"github.com/ugorji/go/codec"
"io"
@ -154,7 +155,7 @@ func (w *httpWriter) writeBulk(b []byte) {
if b == nil {
w.genericWrite(nil)
} else {
w.genericWrite(ledis.String(b))
w.genericWrite(hack.String(b))
}
}
@ -168,7 +169,7 @@ func (w *httpWriter) writeSliceArray(lst [][]byte) {
if elem == nil {
arr[i] = nil
} else {
arr[i] = ledis.String(elem)
arr[i] = hack.String(elem)
}
}
w.genericWrite(arr)
@ -177,7 +178,7 @@ func (w *httpWriter) writeSliceArray(lst [][]byte) {
func (w *httpWriter) writeFVPairArray(lst []ledis.FVPair) {
m := make(map[string]string)
for _, elem := range lst {
m[ledis.String(elem.Field)] = ledis.String(elem.Value)
m[hack.String(elem.Field)] = hack.String(elem.Value)
}
w.genericWrite(m)
}
@ -187,13 +188,13 @@ func (w *httpWriter) writeScorePairArray(lst []ledis.ScorePair, withScores bool)
if withScores {
arr = make([]string, 2*len(lst))
for i, data := range lst {
arr[2*i] = ledis.String(data.Member)
arr[2*i] = hack.String(data.Member)
arr[2*i+1] = strconv.FormatInt(data.Score, 10)
}
} else {
arr = make([]string, len(lst))
for i, data := range lst {
arr[i] = ledis.String(data.Member)
arr[i] = hack.String(data.Member)
}
}
w.genericWrite(arr)

36
server/client_resp.go
View File

@ -3,7 +3,9 @@ package server
import (
"bufio"
"errors"
"github.com/siddontang/go-log/log"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/log"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/ledis"
"io"
"net"
@ -57,6 +59,8 @@ func (c *respClient) run() {
c.tx.Rollback()
c.tx = nil
}
c.app.removeSlave(c.client)
}()
for {
@ -83,7 +87,7 @@ func (c *respClient) readRequest() ([][]byte, error) {
}
var nparams int
if nparams, err = strconv.Atoi(ledis.String(l[1:])); err != nil {
if nparams, err = strconv.Atoi(hack.String(l[1:])); err != nil {
return nil, err
} else if nparams <= 0 {
return nil, errReadRequest
@ -100,7 +104,7 @@ func (c *respClient) readRequest() ([][]byte, error) {
return nil, errReadRequest
} else if l[0] == '$' {
//handle resp string
if n, err = strconv.Atoi(ledis.String(l[1:])); err != nil {
if n, err = strconv.Atoi(hack.String(l[1:])); err != nil {
return nil, err
} else if n == -1 {
req = append(req, nil)
@ -133,7 +137,7 @@ func (c *respClient) handleRequest(reqData [][]byte) {
c.cmd = ""
c.args = reqData[0:0]
} else {
c.cmd = strings.ToLower(ledis.String(reqData[0]))
c.cmd = strings.ToLower(hack.String(reqData[0]))
c.args = reqData[1:]
}
if c.cmd == "quit" {
@ -157,23 +161,23 @@ func newWriterRESP(conn net.Conn) *respWriter {
}
func (w *respWriter) writeError(err error) {
w.buff.Write(ledis.Slice("-ERR"))
w.buff.Write(hack.Slice("-ERR"))
if err != nil {
w.buff.WriteByte(' ')
w.buff.Write(ledis.Slice(err.Error()))
w.buff.Write(hack.Slice(err.Error()))
}
w.buff.Write(Delims)
}
func (w *respWriter) writeStatus(status string) {
w.buff.WriteByte('+')
w.buff.Write(ledis.Slice(status))
w.buff.Write(hack.Slice(status))
w.buff.Write(Delims)
}
func (w *respWriter) writeInteger(n int64) {
w.buff.WriteByte(':')
w.buff.Write(ledis.StrPutInt64(n))
w.buff.Write(num.FormatInt64ToSlice(n))
w.buff.Write(Delims)
}
@ -182,7 +186,7 @@ func (w *respWriter) writeBulk(b []byte) {
if b == nil {
w.buff.Write(NullBulk)
} else {
w.buff.Write(ledis.Slice(strconv.Itoa(len(b))))
w.buff.Write(hack.Slice(strconv.Itoa(len(b))))
w.buff.Write(Delims)
w.buff.Write(b)
}
@ -196,7 +200,7 @@ func (w *respWriter) writeArray(lst []interface{}) {
w.buff.Write(NullArray)
w.buff.Write(Delims)
} else {
w.buff.Write(ledis.Slice(strconv.Itoa(len(lst))))
w.buff.Write(hack.Slice(strconv.Itoa(len(lst))))
w.buff.Write(Delims)
for i := 0; i < len(lst); i++ {
@ -224,7 +228,7 @@ func (w *respWriter) writeSliceArray(lst [][]byte) {
w.buff.Write(NullArray)
w.buff.Write(Delims)
} else {
w.buff.Write(ledis.Slice(strconv.Itoa(len(lst))))
w.buff.Write(hack.Slice(strconv.Itoa(len(lst))))
w.buff.Write(Delims)
for i := 0; i < len(lst); i++ {
@ -239,7 +243,7 @@ func (w *respWriter) writeFVPairArray(lst []ledis.FVPair) {
w.buff.Write(NullArray)
w.buff.Write(Delims)
} else {
w.buff.Write(ledis.Slice(strconv.Itoa(len(lst) * 2)))
w.buff.Write(hack.Slice(strconv.Itoa(len(lst) * 2)))
w.buff.Write(Delims)
for i := 0; i < len(lst); i++ {
@ -256,10 +260,10 @@ func (w *respWriter) writeScorePairArray(lst []ledis.ScorePair, withScores bool)
w.buff.Write(Delims)
} else {
if withScores {
w.buff.Write(ledis.Slice(strconv.Itoa(len(lst) * 2)))
w.buff.Write(hack.Slice(strconv.Itoa(len(lst) * 2)))
w.buff.Write(Delims)
} else {
w.buff.Write(ledis.Slice(strconv.Itoa(len(lst))))
w.buff.Write(hack.Slice(strconv.Itoa(len(lst))))
w.buff.Write(Delims)
}
@ -268,7 +272,7 @@ func (w *respWriter) writeScorePairArray(lst []ledis.ScorePair, withScores bool)
w.writeBulk(lst[i].Member)
if withScores {
w.writeBulk(ledis.StrPutInt64(lst[i].Score))
w.writeBulk(num.FormatInt64ToSlice(lst[i].Score))
}
}
}
@ -276,7 +280,7 @@ func (w *respWriter) writeScorePairArray(lst []ledis.ScorePair, withScores bool)
func (w *respWriter) writeBulkFrom(n int64, rb io.Reader) {
w.buff.WriteByte('$')
w.buff.Write(ledis.Slice(strconv.FormatInt(n, 10)))
w.buff.Write(hack.Slice(strconv.FormatInt(n, 10)))
w.buff.Write(Delims)
io.Copy(w.buff, rb)

4
server/cmd_bit.go
View File

@ -1,6 +1,8 @@
package server
import (
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/ledis"
"strings"
)
@ -173,7 +175,7 @@ func boptCommand(c *client) error {
return ErrCmdParams
}
opDesc := strings.ToLower(ledis.String(args[0]))
opDesc := strings.ToLower(hack.String(args[0]))
dstKey := args[1]
srcKeys := args[2:]

15
server/cmd_kv.go
View File

@ -1,6 +1,7 @@
package server
import (
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/ledis"
"strconv"
"strings"
@ -292,26 +293,26 @@ func parseScanArgs(c *client) (key []byte, match string, count int, err error) {
}
if len(args) == 3 {
switch strings.ToLower(ledis.String(args[1])) {
switch strings.ToLower(hack.String(args[1])) {
case "match":
match = ledis.String(args[2])
match = hack.String(args[2])
case "count":
count, err = strconv.Atoi(ledis.String(args[2]))
count, err = strconv.Atoi(hack.String(args[2]))
default:
err = ErrCmdParams
return
}
} else if len(args) == 5 {
if strings.ToLower(ledis.String(args[1])) != "match" {
if strings.ToLower(hack.String(args[1])) != "match" {
err = ErrCmdParams
return
} else if strings.ToLower(ledis.String(args[3])) != "count" {
} else if strings.ToLower(hack.String(args[3])) != "count" {
err = ErrCmdParams
return
}
match = ledis.String(args[2])
count, err = strconv.Atoi(ledis.String(args[4]))
match = hack.String(args[2])
count, err = strconv.Atoi(hack.String(args[4]))
}
if count <= 0 {

62
server/cmd_replication.go
View File

@ -1,9 +1,8 @@
package server
import (
"encoding/binary"
"fmt"
"github.com/siddontang/go-snappy/snappy"
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/ledis"
"io/ioutil"
"os"
@ -14,24 +13,32 @@ import (
func slaveofCommand(c *client) error {
args := c.args
if len(args) != 2 {
if len(args) != 2 || len(args) != 3 {
return ErrCmdParams
}
masterAddr := ""
restart := false
if strings.ToLower(ledis.String(args[0])) == "no" &&
strings.ToLower(ledis.String(args[1])) == "one" {
if strings.ToLower(hack.String(args[0])) == "no" &&
strings.ToLower(hack.String(args[1])) == "one" {
//stop replication, use master = ""
if len(args) != 2 {
return ErrCmdParams
}
} else {
if _, err := strconv.ParseInt(ledis.String(args[1]), 10, 16); err != nil {
if _, err := strconv.ParseInt(hack.String(args[1]), 10, 16); err != nil {
return err
}
masterAddr = fmt.Sprintf("%s:%s", args[0], args[1])
if len(args) == 3 && strings.ToLower(hack.String(args[2])) == "restart" {
restart = true
}
}
if err := c.app.slaveof(masterAddr); err != nil {
if err := c.app.slaveof(masterAddr, restart); err != nil {
return err
}
@ -66,55 +73,38 @@ func fullsyncCommand(c *client) error {
return nil
}
var reserveInfoSpace = make([]byte, 16)
func syncCommand(c *client) error {
args := c.args
if len(args) != 2 {
if len(args) != 1 {
return ErrCmdParams
}
var logIndex int64
var logPos int64
var logId uint64
var err error
logIndex, err = ledis.StrInt64(args[0], nil)
if err != nil {
if logId, err = ledis.StrUint64(args[0], nil); err != nil {
return ErrCmdParams
}
logPos, err = ledis.StrInt64(args[1], nil)
if err != nil {
return ErrCmdParams
c.lastLogID = logId - 1
if c.ack != nil && logId > c.ack.id {
asyncNotifyUint64(c.ack.ch, logId)
c.ack = nil
}
c.syncBuf.Reset()
//reserve space to write binlog anchor
if _, err := c.syncBuf.Write(reserveInfoSpace); err != nil {
return err
}
m := &ledis.BinLogAnchor{logIndex, logPos}
if _, err := c.app.ldb.ReadEventsToTimeout(m, &c.syncBuf, 5); err != nil {
if _, _, err := c.app.ldb.ReadLogsToTimeout(logId, &c.syncBuf, 30); err != nil {
return err
} else {
buf := c.syncBuf.Bytes()
binary.BigEndian.PutUint64(buf[0:], uint64(m.LogFileIndex))
binary.BigEndian.PutUint64(buf[8:], uint64(m.LogPos))
if len(c.compressBuf) < snappy.MaxEncodedLen(len(buf)) {
c.compressBuf = make([]byte, snappy.MaxEncodedLen(len(buf)))
}
if buf, err = snappy.Encode(c.compressBuf, buf); err != nil {
return err
}
c.resp.writeBulk(buf)
}
c.app.addSlave(c)
return nil
}

64
server/cmd_replication_test.go
View File

@ -1,25 +1,32 @@
package server
import (
"bytes"
"fmt"
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/store"
"os"
"reflect"
"testing"
"time"
)
func checkDataEqual(master *App, slave *App) error {
it := master.ldb.DataDB().RangeLimitIterator(nil, nil, store.RangeClose, 0, -1)
for ; it.Valid(); it.Next() {
key := it.Key()
value := it.Value()
mdb, _ := master.ldb.Select(0)
sdb, _ := slave.ldb.Select(0)
if v, err := slave.ldb.DataDB().Get(key); err != nil {
return err
} else if !bytes.Equal(v, value) {
return fmt.Errorf("replication error %d != %d", len(v), len(value))
mkeys, _ := mdb.Scan(nil, 100, true, "")
skeys, _ := sdb.Scan(nil, 100, true, "")
if len(mkeys) != len(skeys) {
return fmt.Errorf("keys number not equal %d != %d", len(mkeys), len(skeys))
} else if !reflect.DeepEqual(mkeys, skeys) {
return fmt.Errorf("keys not equal")
} else {
for _, k := range mkeys {
v1, _ := mdb.Get(k)
v2, _ := sdb.Get(k)
if !reflect.DeepEqual(v1, v2) {
return fmt.Errorf("value not equal")
}
}
}
@ -33,8 +40,9 @@ func TestReplication(t *testing.T) {
masterCfg := new(config.Config)
masterCfg.DataDir = fmt.Sprintf("%s/master", data_dir)
masterCfg.Addr = "127.0.0.1:11182"
masterCfg.BinLog.MaxFileSize = 1 * 1024 * 1024
masterCfg.BinLog.MaxFileNum = 10
masterCfg.UseReplication = true
masterCfg.Replication.Sync = true
masterCfg.Replication.WaitSyncTime = 5
var master *App
var slave *App
@ -49,6 +57,7 @@ func TestReplication(t *testing.T) {
slaveCfg.DataDir = fmt.Sprintf("%s/slave", data_dir)
slaveCfg.Addr = "127.0.0.1:11183"
slaveCfg.SlaveOf = masterCfg.Addr
slaveCfg.UseReplication = true
slave, err = NewApp(slaveCfg)
if err != nil {
@ -58,50 +67,53 @@ func TestReplication(t *testing.T) {
go master.Run()
time.Sleep(1 * time.Second)
go slave.Run()
db, _ := master.ldb.Select(0)
value := make([]byte, 10)
db.Set([]byte("a"), value)
db.Set([]byte("b"), value)
db.HSet([]byte("a"), []byte("1"), value)
db.HSet([]byte("b"), []byte("2"), value)
go slave.Run()
db.Set([]byte("c"), value)
db.Set([]byte("d"), value)
time.Sleep(1 * time.Second)
if err = checkDataEqual(master, slave); err != nil {
t.Fatal(err)
}
db.Set([]byte("a1"), value)
db.Set([]byte("b1"), value)
db.HSet([]byte("a1"), []byte("1"), value)
db.HSet([]byte("b1"), []byte("2"), value)
db.Set([]byte("c1"), value)
db.Set([]byte("d1"), value)
//time.Sleep(1 * time.Second)
slave.ldb.WaitReplication()
time.Sleep(1 * time.Second)
if err = checkDataEqual(master, slave); err != nil {
t.Fatal(err)
}
slave.slaveof("")
slave.slaveof("", false)
db.Set([]byte("a2"), value)
db.Set([]byte("b2"), value)
db.HSet([]byte("a2"), []byte("1"), value)
db.HSet([]byte("b2"), []byte("2"), value)
db.Set([]byte("c2"), value)
db.Set([]byte("d2"), value)
db.Set([]byte("a3"), value)
db.Set([]byte("b3"), value)
db.HSet([]byte("a3"), []byte("1"), value)
db.HSet([]byte("b3"), []byte("2"), value)
db.Set([]byte("c3"), value)
db.Set([]byte("d3"), value)
if err = checkDataEqual(master, slave); err == nil {
t.Fatal("must error")
}
slave.slaveof(masterCfg.Addr)
slave.slaveof(masterCfg.Addr, false)
time.Sleep(1 * time.Second)
if err = checkDataEqual(master, slave); err != nil {

17
server/cmd_script.go
View File

@ -6,7 +6,8 @@ import (
"crypto/sha1"
"encoding/hex"
"fmt"
"github.com/siddontang/ledisdb/ledis"
"github.com/siddontang/go/hack"
"github.com/siddontang/ledisdb/lua"
"strconv"
"strings"
@ -20,7 +21,7 @@ func parseEvalArgs(l *lua.State, c *client) error {
args = args[1:]
n, err := strconv.Atoi(ledis.String(args[0]))
n, err := strconv.Atoi(hack.String(args[0]))
if err != nil {
return err
}
@ -72,7 +73,7 @@ func evalGenericCommand(c *client, evalSha1 bool) error {
h := sha1.Sum(c.args[0])
key = hex.EncodeToString(h[0:20])
} else {
key = strings.ToLower(ledis.String(c.args[0]))
key = strings.ToLower(hack.String(c.args[0]))
}
l.GetGlobal(key)
@ -84,7 +85,7 @@ func evalGenericCommand(c *client, evalSha1 bool) error {
return fmt.Errorf("missing %s script", key)
}
if r := l.LoadString(ledis.String(c.args[0])); r != 0 {
if r := l.LoadString(hack.String(c.args[0])); r != 0 {
err := fmt.Errorf("%s", l.ToString(-1))
l.Pop(1)
return err
@ -139,7 +140,7 @@ func scriptCommand(c *client) error {
return ErrCmdParams
}
switch strings.ToLower(ledis.String(args[0])) {
switch strings.ToLower(hack.String(args[0])) {
case "load":
return scriptLoadCommand(c)
case "exists":
@ -164,7 +165,7 @@ func scriptLoadCommand(c *client) error {
h := sha1.Sum(c.args[1])
key := hex.EncodeToString(h[0:20])
if r := l.LoadString(ledis.String(c.args[1])); r != 0 {
if r := l.LoadString(hack.String(c.args[1])); r != 0 {
err := fmt.Errorf("%s", l.ToString(-1))
l.Pop(1)
return err
@ -175,7 +176,7 @@ func scriptLoadCommand(c *client) error {
s.chunks[key] = struct{}{}
}
c.resp.writeBulk(ledis.Slice(key))
c.resp.writeBulk(hack.Slice(key))
return nil
}
@ -188,7 +189,7 @@ func scriptExistsCommand(c *client) error {
ay := make([]interface{}, len(c.args[1:]))
for i, n := range c.args[1:] {
if _, ok := s.chunks[ledis.String(n)]; ok {
if _, ok := s.chunks[hack.String(n)]; ok {
ay[i] = int64(1)
} else {
ay[i] = int64(0)

92
server/cmd_server.go Normal file
View File

@ -0,0 +1,92 @@
package server
import (
"github.com/siddontang/go/hack"
"strconv"
"strings"
)
func pingCommand(c *client) error {
c.resp.writeStatus(PONG)
return nil
}
func echoCommand(c *client) error {
if len(c.args) != 1 {
return ErrCmdParams
}
c.resp.writeBulk(c.args[0])
return nil
}
func selectCommand(c *client) error {
if len(c.args) != 1 {
return ErrCmdParams
}
if index, err := strconv.Atoi(hack.String(c.args[0])); err != nil {
return err
} else {
if c.db.IsInMulti() {
if err := c.script.Select(index); err != nil {
return err
} else {
c.db = c.script.DB
}
} else {
if db, err := c.ldb.Select(index); err != nil {
return err
} else {
c.db = db
}
}
c.resp.writeStatus(OK)
}
return nil
}
func infoCommand(c *client) error {
if len(c.args) > 1 {
return ErrCmdParams
}
var section string
if len(c.args) == 1 {
section = strings.ToLower(hack.String(c.args[0]))
}
buf := c.app.info.Dump(section)
c.resp.writeBulk(buf)
return nil
}
func flushallCommand(c *client) error {
err := c.ldb.FlushAll()
if err != nil {
return err
}
c.resp.writeStatus(OK)
return nil
}
func flushdbCommand(c *client) error {
_, err := c.db.FlushAll()
if err != nil {
return err
}
c.resp.writeStatus(OK)
return nil
}
func init() {
register("ping", pingCommand)
register("echo", echoCommand)
register("select", selectCommand)
register("info", infoCommand)
register("flushall", flushallCommand)
register("flushdb", flushdbCommand)
}

36
server/cmd_zset.go
View File

@ -2,6 +2,8 @@ package server
import (
"errors"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/ledis"
"math"
"strconv"
@ -73,7 +75,7 @@ func zscoreCommand(c *client) error {
return err
}
} else {
c.resp.writeBulk(ledis.StrPutInt64(s))
c.resp.writeBulk(num.FormatInt64ToSlice(s))
}
return nil
@ -110,14 +112,14 @@ func zincrbyCommand(c *client) error {
v, err := c.db.ZIncrBy(key, delta, args[2])
if err == nil {
c.resp.writeBulk(ledis.StrPutInt64(v))
c.resp.writeBulk(num.FormatInt64ToSlice(v))
}
return err
}
func zparseScoreRange(minBuf []byte, maxBuf []byte) (min int64, max int64, err error) {
if strings.ToLower(ledis.String(minBuf)) == "-inf" {
if strings.ToLower(hack.String(minBuf)) == "-inf" {
min = math.MinInt64
} else {
@ -148,7 +150,7 @@ func zparseScoreRange(minBuf []byte, maxBuf []byte) (min int64, max int64, err e
}
}
if strings.ToLower(ledis.String(maxBuf)) == "+inf" {
if strings.ToLower(hack.String(maxBuf)) == "+inf" {
max = math.MaxInt64
} else {
var ropen = false
@ -289,11 +291,11 @@ func zremrangebyscoreCommand(c *client) error {
}
func zparseRange(c *client, a1 []byte, a2 []byte) (start int, stop int, err error) {
if start, err = strconv.Atoi(ledis.String(a1)); err != nil {
if start, err = strconv.Atoi(hack.String(a1)); err != nil {
return
}
if stop, err = strconv.Atoi(ledis.String(a2)); err != nil {
if stop, err = strconv.Atoi(hack.String(a2)); err != nil {
return
}
@ -320,7 +322,7 @@ func zrangeGeneric(c *client, reverse bool) error {
if len(args) != 1 {
return ErrCmdParams
}
if strings.ToLower(ledis.String(args[0])) == "withscores" {
if strings.ToLower(hack.String(args[0])) == "withscores" {
withScores = true
} else {
return ErrSyntax
@ -370,7 +372,7 @@ func zrangebyscoreGeneric(c *client, reverse bool) error {
var withScores bool = false
if len(args) > 0 {
if strings.ToLower(ledis.String(args[0])) == "withscores" {
if strings.ToLower(hack.String(args[0])) == "withscores" {
withScores = true
args = args[1:]
}
@ -384,15 +386,15 @@ func zrangebyscoreGeneric(c *client, reverse bool) error {
return ErrCmdParams
}
if strings.ToLower(ledis.String(args[0])) != "limit" {
if strings.ToLower(hack.String(args[0])) != "limit" {
return ErrSyntax
}
if offset, err = strconv.Atoi(ledis.String(args[1])); err != nil {
if offset, err = strconv.Atoi(hack.String(args[1])); err != nil {
return ErrValue
}
if count, err = strconv.Atoi(ledis.String(args[2])); err != nil {
if count, err = strconv.Atoi(hack.String(args[2])); err != nil {
return ErrValue
}
}
@ -523,7 +525,7 @@ func zpersistCommand(c *client) error {
func zparseZsetoptStore(args [][]byte) (destKey []byte, srcKeys [][]byte, weights []int64, aggregate byte, err error) {
destKey = args[0]
nKeys, err := strconv.Atoi(ledis.String(args[1]))
nKeys, err := strconv.Atoi(hack.String(args[1]))
if err != nil {
err = ErrValue
return
@ -542,7 +544,7 @@ func zparseZsetoptStore(args [][]byte) (destKey []byte, srcKeys [][]byte, weight
var aggregateFlag = false
for len(args) > 0 {
if strings.ToLower(ledis.String(args[0])) == "weights" {
if strings.ToLower(hack.String(args[0])) == "weights" {
if weightsFlag {
err = ErrSyntax
return
@ -565,7 +567,7 @@ func zparseZsetoptStore(args [][]byte) (destKey []byte, srcKeys [][]byte, weight
weightsFlag = true
} else if strings.ToLower(ledis.String(args[0])) == "aggregate" {
} else if strings.ToLower(hack.String(args[0])) == "aggregate" {
if aggregateFlag {
err = ErrSyntax
return
@ -575,11 +577,11 @@ func zparseZsetoptStore(args [][]byte) (destKey []byte, srcKeys [][]byte, weight
return
}
if strings.ToLower(ledis.String(args[1])) == "sum" {
if strings.ToLower(hack.String(args[1])) == "sum" {
aggregate = ledis.AggregateSum
} else if strings.ToLower(ledis.String(args[1])) == "min" {
} else if strings.ToLower(hack.String(args[1])) == "min" {
aggregate = ledis.AggregateMin
} else if strings.ToLower(ledis.String(args[1])) == "max" {
} else if strings.ToLower(hack.String(args[1])) == "max" {
aggregate = ledis.AggregateMax
} else {
err = ErrSyntax

93
server/command.go
View File

@ -2,8 +2,6 @@ package server
import (
"fmt"
"github.com/siddontang/ledisdb/ledis"
"strconv"
"strings"
)
@ -18,94 +16,3 @@ func register(name string, f CommandFunc) {
regCmds[name] = f
}
func pingCommand(c *client) error {
c.resp.writeStatus(PONG)
return nil
}
func echoCommand(c *client) error {
if len(c.args) != 1 {
return ErrCmdParams
}
c.resp.writeBulk(c.args[0])
return nil
}
func selectCommand(c *client) error {
if len(c.args) != 1 {
return ErrCmdParams
}
if index, err := strconv.Atoi(ledis.String(c.args[0])); err != nil {
return err
} else {
if c.db.IsTransaction() {
if err := c.tx.Select(index); err != nil {
return err
} else {
c.db = c.tx.DB
}
} else if c.db.IsInMulti() {
if err := c.script.Select(index); err != nil {
return err
} else {
c.db = c.script.DB
}
} else {
if db, err := c.ldb.Select(index); err != nil {
return err
} else {
c.db = db
}
}
c.resp.writeStatus(OK)
}
return nil
}
func infoCommand(c *client) error {
if len(c.args) > 1 {
return ErrSyntax
}
var section string
if len(c.args) == 1 {
section = strings.ToLower(ledis.String(c.args[0]))
}
buf := c.app.info.Dump(section)
c.resp.writeBulk(buf)
return nil
}
func flushallCommand(c *client) error {
err := c.ldb.FlushAll()
if err != nil {
return err
}
c.resp.writeStatus(OK)
return nil
}
func flushdbCommand(c *client) error {
_, err := c.db.FlushAll()
if err != nil {
return err
}
c.resp.writeStatus(OK)
return nil
}
func init() {
register("ping", pingCommand)
register("echo", echoCommand)
register("select", selectCommand)
register("info", infoCommand)
register("flushall", flushallCommand)
register("flushdb", flushdbCommand)
}

3
server/doc.go
View File

@ -24,7 +24,8 @@
// ledis-cli -p 6381
// ledis 127.0.0.1:6381 > slaveof 127.0.0.1 6380
//
// After you send slaveof command, the slave will start to sync master's binlog and replicate from binlog.
// After you send slaveof command, the slave will start to sync master's write ahead log and replicate from it.
// You must notice that use_replication must be set true if you want to use it.
//
// HTTP Interface
//

27
server/info.go
View File

@ -81,6 +81,8 @@ func (i *info) Dump(section string) []byte {
i.dumpPersistence(buf)
case "goroutine":
i.dumpGoroutine(buf)
case "replication":
i.dumpReplication(buf)
default:
buf.WriteString(fmt.Sprintf("# %s\r\n", section))
}
@ -103,6 +105,8 @@ func (i *info) dumpAll(buf *bytes.Buffer) {
i.dumpMem(buf)
buf.Write(Delims)
i.dumpGoroutine(buf)
buf.Write(Delims)
i.dumpReplication(buf)
}
func (i *info) dumpServer(buf *bytes.Buffer) {
@ -142,6 +146,29 @@ func (i *info) dumpPersistence(buf *bytes.Buffer) {
i.dumpPairs(buf, infoPair{"db_name", i.Persistence.DBName})
}
func (i *info) dumpReplication(buf *bytes.Buffer) {
buf.WriteString("# Replication\r\n")
p := []infoPair{}
slaves := make([]string, 0, len(i.app.slaves))
for s, _ := range i.app.slaves {
slaves = append(slaves, s.remoteAddr)
}
p = append(p, infoPair{"readonly", i.app.ldb.IsReadOnly()})
if len(slaves) > 0 {
p = append(p, infoPair{"slave", strings.Join(slaves, ",")})
}
s, _ := i.app.ldb.ReplicationStat()
p = append(p, infoPair{"last_log_id", s.LastID})
p = append(p, infoPair{"first_log_id", s.FirstID})
p = append(p, infoPair{"commit_log_id", s.CommitID})
i.dumpPairs(buf, p...)
}
func (i *info) dumpPairs(buf *bytes.Buffer, pairs ...infoPair) {
for _, v := range pairs {
buf.WriteString(fmt.Sprintf("%s:%v\r\n", v.Key, v.Value))

308
server/replication.go
View File

@ -3,14 +3,12 @@ package server
import (
"bufio"
"bytes"
"encoding/binary"
"encoding/json"
"errors"
"fmt"
"github.com/siddontang/go-log/log"
"github.com/siddontang/go-snappy/snappy"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/log"
"github.com/siddontang/ledisdb/ledis"
"io/ioutil"
"github.com/siddontang/ledisdb/rpl"
"net"
"os"
"path"
@ -23,52 +21,6 @@ var (
errConnectMaster = errors.New("connect master error")
)
type MasterInfo struct {
Addr string `json:"addr"`
LogFileIndex int64 `json:"log_file_index"`
LogPos int64 `json:"log_pos"`
}
func (m *MasterInfo) Save(filePath string) error {
data, err := json.Marshal(m)
if err != nil {
return err
}
filePathBak := fmt.Sprintf("%s.bak", filePath)
var fd *os.File
fd, err = os.OpenFile(filePathBak, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
if _, err = fd.Write(data); err != nil {
fd.Close()
return err
}
fd.Close()
return os.Rename(filePathBak, filePath)
}
func (m *MasterInfo) Load(filePath string) error {
data, err := ioutil.ReadFile(filePath)
if err != nil {
if os.IsNotExist(err) {
return nil
} else {
return err
}
}
if err = json.Unmarshal(data, m); err != nil {
return err
}
return nil
}
type master struct {
sync.Mutex
@ -79,40 +31,24 @@ type master struct {
quit chan struct{}
infoName string
info *MasterInfo
addr string
wg sync.WaitGroup
syncBuf bytes.Buffer
compressBuf []byte
}
func newMaster(app *App) *master {
m := new(master)
m.app = app
m.infoName = path.Join(m.app.cfg.DataDir, "master.info")
m.quit = make(chan struct{}, 1)
m.compressBuf = make([]byte, 256)
m.info = new(MasterInfo)
//if load error, we will start a fullsync later
m.loadInfo()
return m
}
func (m *master) Close() {
select {
case m.quit <- struct{}{}:
default:
}
ledis.AsyncNotify(m.quit)
if m.conn != nil {
m.conn.Close()
@ -122,16 +58,8 @@ func (m *master) Close() {
m.wg.Wait()
}
func (m *master) loadInfo() error {
return m.info.Load(m.infoName)
}
func (m *master) saveInfo() error {
return m.info.Save(m.infoName)
}
func (m *master) connect() error {
if len(m.info.Addr) == 0 {
if len(m.addr) == 0 {
return fmt.Errorf("no assign master addr")
}
@ -140,7 +68,7 @@ func (m *master) connect() error {
m.conn = nil
}
if conn, err := net.Dial("tcp", m.info.Addr); err != nil {
if conn, err := net.Dial("tcp", m.addr); err != nil {
return err
} else {
m.conn = conn
@ -150,42 +78,27 @@ func (m *master) connect() error {
return nil
}
func (m *master) resetInfo(addr string) {
m.info.Addr = addr
m.info.LogFileIndex = 0
m.info.LogPos = 0
}
func (m *master) stopReplication() error {
m.Close()
if err := m.saveInfo(); err != nil {
log.Error("save master info error %s", err.Error())
return err
}
return nil
}
func (m *master) startReplication(masterAddr string) error {
func (m *master) startReplication(masterAddr string, restart bool) error {
//stop last replcation, if avaliable
m.Close()
if masterAddr != m.info.Addr {
m.resetInfo(masterAddr)
if err := m.saveInfo(); err != nil {
log.Error("save master info error %s", err.Error())
return err
}
}
m.addr = masterAddr
m.quit = make(chan struct{}, 1)
go m.runReplication()
m.app.ldb.SetReadOnly(true)
go m.runReplication(restart)
return nil
}
func (m *master) runReplication() {
func (m *master) runReplication(restart bool) {
m.wg.Add(1)
defer m.wg.Done()
@ -195,34 +108,27 @@ func (m *master) runReplication() {
return
default:
if err := m.connect(); err != nil {
log.Error("connect master %s error %s, try 2s later", m.info.Addr, err.Error())
log.Error("connect master %s error %s, try 2s later", m.addr, err.Error())
time.Sleep(2 * time.Second)
continue
}
}
if m.info.LogFileIndex == 0 {
//try a fullsync
if restart {
if err := m.fullSync(); err != nil {
if m.conn != nil {
//if conn == nil, other close the replication, not error
log.Warn("full sync error %s", err.Error())
log.Error("restart fullsync error %s", err.Error())
}
return
}
if m.info.LogFileIndex == 0 {
//master not support binlog, we cannot sync, so stop replication
m.stopReplication()
return
}
}
for {
if err := m.sync(); err != nil {
if m.conn != nil {
//if conn == nil, other close the replication, not error
log.Warn("sync error %s", err.Error())
log.Error("sync error %s", err.Error())
}
return
}
@ -241,10 +147,12 @@ func (m *master) runReplication() {
var (
fullSyncCmd = []byte("*1\r\n$8\r\nfullsync\r\n") //fullsync
syncCmdFormat = "*3\r\n$4\r\nsync\r\n$%d\r\n%s\r\n$%d\r\n%s\r\n" //sync index pos
syncCmdFormat = "*2\r\n$4\r\nsync\r\n$%d\r\n%s\r\n" //sync logid
)
func (m *master) fullSync() error {
log.Info("begin full sync")
if _, err := m.conn.Write(fullSyncCmd); err != nil {
return err
}
@ -264,30 +172,38 @@ func (m *master) fullSync() error {
return err
}
if err = m.app.ldb.FlushAll(); err != nil {
return err
}
var head *ledis.BinLogAnchor
head, err = m.app.ldb.LoadDumpFile(dumpPath)
if err != nil {
if _, err = m.app.ldb.LoadDumpFile(dumpPath); err != nil {
log.Error("load dump file error %s", err.Error())
return err
}
m.info.LogFileIndex = head.LogFileIndex
m.info.LogPos = head.LogPos
return nil
}
return m.saveInfo()
func (m *master) nextSyncLogID() (uint64, error) {
s, err := m.app.ldb.ReplicationStat()
if err != nil {
return 0, err
}
if s.LastID > s.CommitID {
return s.LastID + 1, nil
} else {
return s.CommitID + 1, nil
}
}
func (m *master) sync() error {
logIndexStr := strconv.FormatInt(m.info.LogFileIndex, 10)
logPosStr := strconv.FormatInt(m.info.LogPos, 10)
var err error
var syncID uint64
if syncID, err = m.nextSyncLogID(); err != nil {
return err
}
cmd := ledis.Slice(fmt.Sprintf(syncCmdFormat, len(logIndexStr),
logIndexStr, len(logPosStr), logPosStr))
logIDStr := strconv.FormatUint(syncID, 10)
cmd := hack.Slice(fmt.Sprintf(syncCmdFormat, len(logIDStr),
logIDStr))
if _, err := m.conn.Write(cmd); err != nil {
return err
@ -295,53 +211,129 @@ func (m *master) sync() error {
m.syncBuf.Reset()
err := ReadBulkTo(m.rb, &m.syncBuf)
if err != nil {
return err
}
var buf []byte
buf, err = snappy.Decode(m.compressBuf, m.syncBuf.Bytes())
if err != nil {
return err
} else if len(buf) > len(m.compressBuf) {
m.compressBuf = buf
}
if len(buf) < 16 {
return fmt.Errorf("invalid sync data len %d", len(buf))
}
m.info.LogFileIndex = int64(binary.BigEndian.Uint64(buf[0:8]))
m.info.LogPos = int64(binary.BigEndian.Uint64(buf[8:16]))
if m.info.LogFileIndex == 0 {
//master now not support binlog, stop replication
if err = ReadBulkTo(m.rb, &m.syncBuf); err != nil {
switch err.Error() {
case ledis.ErrLogMissed.Error():
return m.fullSync()
case ledis.ErrRplNotSupport.Error():
m.stopReplication()
return nil
} else if m.info.LogFileIndex == -1 {
//-1 means than binlog index and pos are lost, we must start a full sync instead
return m.fullSync()
default:
return err
}
}
err = m.app.ldb.ReplicateFromData(buf[16:])
if err != nil {
buf := m.syncBuf.Bytes()
if len(buf) == 0 {
return nil
}
if err = m.app.ldb.StoreLogsFromData(buf); err != nil {
return err
}
return m.saveInfo()
return nil
}
func (app *App) slaveof(masterAddr string) error {
func (app *App) slaveof(masterAddr string, restart bool) error {
app.m.Lock()
defer app.m.Unlock()
if !app.ldb.ReplicationUsed() {
return fmt.Errorf("slaveof must enable replication")
}
if len(masterAddr) == 0 {
return app.m.stopReplication()
if err := app.m.stopReplication(); err != nil {
return err
}
app.ldb.SetReadOnly(false)
} else {
return app.m.startReplication(masterAddr)
return app.m.startReplication(masterAddr, restart)
}
return nil
}
func (app *App) addSlave(c *client) {
app.slock.Lock()
defer app.slock.Unlock()
app.slaves[c] = struct{}{}
}
func (app *App) removeSlave(c *client) {
app.slock.Lock()
defer app.slock.Unlock()
delete(app.slaves, c)
if c.ack != nil {
asyncNotifyUint64(c.ack.ch, c.lastLogID)
}
}
func asyncNotifyUint64(ch chan uint64, v uint64) {
select {
case ch <- v:
default:
}
}
func (app *App) publishNewLog(l *rpl.Log) {
if !app.cfg.Replication.Sync {
//no sync replication, we will do async
return
}
ss := make([]*client, 0, 4)
app.slock.Lock()
logId := l.ID
for s, _ := range app.slaves {
if s.lastLogID >= logId {
//slave has already this log
ss = []*client{}
break
} else {
ss = append(ss, s)
}
}
app.slock.Unlock()
if len(ss) == 0 {
return
}
ack := &syncAck{
logId, make(chan uint64, len(ss)),
}
for _, s := range ss {
s.ack = ack
}
done := make(chan struct{}, 1)
go func(total int) {
n := 0
for i := 0; i < len(ss); i++ {
id := <-ack.ch
if id > logId {
n++
if n >= total {
break
}
}
}
done <- struct{}{}
}((len(ss) + 1) / 2)
select {
case <-done:
case <-time.After(time.Duration(app.cfg.Replication.WaitSyncTime) * time.Second):
}
}

22
server/script.go
View File

@ -5,6 +5,8 @@ package server
import (
"encoding/hex"
"fmt"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/ledis"
"github.com/siddontang/ledisdb/lua"
"io"
@ -38,7 +40,7 @@ func (w *luaWriter) writeBulk(b []byte) {
if b == nil {
w.l.PushBoolean(false)
} else {
w.l.PushString(ledis.String(b))
w.l.PushString(hack.String(b))
}
}
@ -81,7 +83,7 @@ func (w *luaWriter) writeSliceArray(lst [][]byte) {
w.l.CreateTable(len(lst), 0)
for i, v := range lst {
w.l.PushString(ledis.String(v))
w.l.PushString(hack.String(v))
w.l.RawSeti(-2, i+1)
}
}
@ -94,10 +96,10 @@ func (w *luaWriter) writeFVPairArray(lst []ledis.FVPair) {
w.l.CreateTable(len(lst)*2, 0)
for i, v := range lst {
w.l.PushString(ledis.String(v.Field))
w.l.PushString(hack.String(v.Field))
w.l.RawSeti(-2, 2*i+1)
w.l.PushString(ledis.String(v.Value))
w.l.PushString(hack.String(v.Value))
w.l.RawSeti(-2, 2*i+2)
}
}
@ -111,16 +113,16 @@ func (w *luaWriter) writeScorePairArray(lst []ledis.ScorePair, withScores bool)
if withScores {
w.l.CreateTable(len(lst)*2, 0)
for i, v := range lst {
w.l.PushString(ledis.String(v.Member))
w.l.PushString(hack.String(v.Member))
w.l.RawSeti(-2, 2*i+1)
w.l.PushString(ledis.String(ledis.StrPutInt64(v.Score)))
w.l.PushString(hack.String(num.FormatInt64ToSlice(v.Score)))
w.l.RawSeti(-2, 2*i+2)
}
} else {
w.l.CreateTable(len(lst), 0)
for i, v := range lst {
w.l.PushString(ledis.String(v.Member))
w.l.PushString(hack.String(v.Member))
w.l.RawSeti(-2, i+1)
}
}
@ -280,7 +282,7 @@ func luaSha1Hex(l *lua.State) int {
}
s := l.ToString(1)
s = hex.EncodeToString(ledis.Slice(s))
s = hex.EncodeToString(hack.Slice(s))
l.PushString(s)
return 1
@ -333,7 +335,7 @@ func luaSetGlobalArray(l *lua.State, name string, ay [][]byte) {
l.NewTable()
for i := 0; i < len(ay); i++ {
l.PushString(ledis.String(ay[i]))
l.PushString(hack.String(ay[i]))
l.RawSeti(-2, i+1)
}
@ -348,7 +350,7 @@ func luaReplyToLedisReply(l *lua.State) interface{} {
switch l.Type(-1) {
case lua.LUA_TSTRING:
return ledis.Slice(l.ToString(-1))
return hack.Slice(l.ToString(-1))
case lua.LUA_TBOOLEAN:
if l.ToBoolean(-1) {
return int64(1)

4
server/util.go
View File

@ -3,7 +3,7 @@ package server
import (
"bufio"
"errors"
"github.com/siddontang/ledisdb/ledis"
"github.com/siddontang/go/hack"
"io"
"strconv"
)
@ -36,7 +36,7 @@ func ReadBulkTo(rb *bufio.Reader, w io.Writer) error {
} else if l[0] == '$' {
var n int
//handle resp string
if n, err = strconv.Atoi(ledis.String(l[1:])); err != nil {
if n, err = strconv.Atoi(hack.String(l[1:])); err != nil {
return err
} else if n == -1 {
return nil

4
store/store.go
View File

@ -16,7 +16,11 @@ import (
)
func getStorePath(cfg *config.Config) string {
if len(cfg.DBPath) > 0 {
return cfg.DBPath
} else {
return path.Join(cfg.DataDir, fmt.Sprintf("%s_data", cfg.DBName))
}
}
func Open(cfg *config.Config) (*DB, error) {