forked from mirror/ledisdb
200 lines
5.4 KiB
Markdown
200 lines
5.4 KiB
Markdown
# LedisDB
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[](https://travis-ci.org/ledisdb/ledisdb) [](https://codecov.io/gh/ledisdb/ledisdb) [](https://goreportcard.com/report/git.internal/re/ledisdb)
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Ledisdb is a high-performance NoSQL database library and server written in [Go](http://golang.org). It's similar to Redis but store data in disk. It supports many data structures including kv, list, hash, zset, set.
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LedisDB now supports multiple different databases as backends.
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## Features
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+ Rich data structure: KV, List, Hash, ZSet, Set.
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+ Data storage is not limited by RAM.
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+ Various backends supported: LevelDB, goleveldb, RocksDB, RAM.
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+ Supports Lua scripting.
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+ Supports expiration and TTL.
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+ Can be managed via redis-cli.
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+ Easy to embed in your own Go application.
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+ HTTP API support, JSON/BSON/msgpack output.
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+ Replication to guarantee data safety.
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+ Supplies tools to load, dump, and repair database.
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+ Supports cluster, use [xcodis](https://github.com/ledisdb/xcodis).
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+ Authentication (though, not via http).
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+ Repair integrated: You can use `ledis repair` to repair broken databases and `ledis repair-ttl` to repair a very serious bug for key expiration and TTL if you upgraded from v0.4.
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## Build from source
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Create a workspace and checkout ledisdb source
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```shell
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git clone git@github.com:ledisdb/ledisdb.git
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cd ledisdb
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#set build and run environment
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source dev.sh
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make
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make test
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```
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Then you will find all the binary build on `./bin` directory.
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## LevelDB support
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+ Install leveldb and snappy.
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LedisDB supplies a simple script to install leveldb and snappy:
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sudo sh tools/build_leveldb.sh
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It will install leveldb at /usr/local/leveldb and snappy at /usr/local/snappy by default.
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LedisDB uses the modified LevelDB for better performance. [Details.](https://git.internal/re/ledisdb/wiki/leveldb-source-modification)
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You can easily use other LevelDB versions (like Hyper LevelDB or Basho LevelDB) instead, as long as the header files are in `include/leveldb`, not `include/hyperleveldb` or any other location.
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+ Set `LEVELDB_DIR` and `SNAPPY_DIR` to the actual install path in dev.sh.
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+ `make clean && make`
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## RocksDB support
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+ [Install rocksdb(5.1+)](https://github.com/facebook/rocksdb/blob/master/INSTALL.md)(`make shared_lib`) and snappy first.
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LedisDB has not yet supplied a simple script to install.
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+ Set `ROCKSDB_DIR` and `SNAPPY_DIR` to the actual install path in `dev.sh`.
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+ `make clean && make`
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If the RocksDB API changes, LedisDB may not build successfully. LedisDB currently supports RocksDB version 5.1 or later.
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## Choose store database
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LedisDB now supports goleveldb, leveldb, rocksdb, and RAM. It will use goleveldb by default.
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Choosing a store database to use is very simple.
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+ Set in server config file
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db_name = "leveldb"
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+ Set in command flag
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ledis -config=/etc/ledis.conf -db_name=leveldb
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Flag command set will overwrite config setting.
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## Lua support
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Lua is supported using [gopher-lua](https://github.com/yuin/gopher-lua), a Lua VM, completely written in Go.
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## Configuration
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LedisDB uses [toml](https://github.com/toml-lang/toml) as the configuration format. The basic configuration ```./etc/ledis.conf``` in LedisDB source may help you.
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If you don't use a configuration, LedisDB will use the default for you.
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## Server Example
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```shell
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//set run environment if not
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source dev.sh
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./bin/ledis -config=/etc/ledis.conf
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//another shell
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./bin/ledis cli -p 6380
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ledis 127.0.0.1:6380> set a 1
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OK
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ledis 127.0.0.1:6380> get a
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"1"
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//use curl
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curl http://127.0.0.1:11181/SET/hello/world
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→ {"SET":[true,"OK"]}
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curl http://127.0.0.1:11181/0/GET/hello?type=json
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→ {"GET":"world"}
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```
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## Package Example
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```go
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import (
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lediscfg "git.internal/re/ledisdb/config"
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"git.internal/re/ledisdb/ledis"
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)
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# Use Ledis's default config
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cfg := lediscfg.NewConfigDefault()
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l, _ := ledis.Open(cfg)
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db, _ := l.Select(0)
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db.Set(key, value)
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db.Get(key)
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```
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## Replication Example
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Set slaveof in config or dynamiclly
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```shell
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ledis cli -p 6381
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ledis 127.0.0.1:6381> slaveof 127.0.0.1 6380
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OK
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```
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## Cluster support
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LedisDB uses a proxy named [xcodis](https://github.com/ledisdb/xcodis) to support cluster.
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## CONTRIBUTING
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See [CONTRIBUTING.md] .
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## Benchmark
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See [benchmark](https://git.internal/re/ledisdb/wiki/Benchmark) for more.
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## Todo
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See [Issues todo](https://git.internal/re/ledisdb/issues?labels=todo&page=1&state=open)
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## Client
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See [Clients](https://git.internal/re/ledisdb/wiki/Clients) to find or contribute LedisDB client.
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## Links
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+ [Official Website](https://ledisdb.io)
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+ [GoDoc](https://godoc.org/git.internal/re/ledisdb)
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+ [Server Commands](https://git.internal/re/ledisdb/wiki/Commands)
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## Caveat
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+ Changing the backend database at runtime is very dangerous. Data validation is not guaranteed if this is done.
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## Requirement
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+ Go version >= 1.11
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## Related Repos
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+ [pika](https://github.com/Qihoo360/pika)
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## Donate
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If you like the project and want to buy me a cola, you can through:
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|PayPal|微信|
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|[](https://paypal.me/siddontang)|[|
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## Feedback
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+ Gmail: siddontang@gmail.com
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