# LedisDB

Ledisdb is a high performance NoSQL like Redis written by go. It supports some advanced data structure like kv, list, hash and zset, and may be alternative for Redis.

LedisDB now supports multi database as backend to store data, you can test and choose the proper one for you.

## Features

+ Rich advanced data structure: KV, List, Hash, ZSet, Bit.
+ Stores lots of data, over the memory limit. 
+ Various backend database to use: LevelDB, goleveldb, LMDB.  
+ Supports expiration and ttl.
+ Redis clients, like redis-cli, are supported directly.
+ Multi client API supports, including Golang, Python, Lua(Openresty). 
+ Easy to embed in Golang application. 
+ Replication to guarantee data safe.
+ Supplies tools to load, dump, repair database. 

## Build and Install

Create a workspace and checkout ledisdb source

    mkdir $WORKSPACE
    cd $WORKSPACE
    git clone git@github.com:siddontang/ledisdb.git src/github.com/siddontang/ledisdb

    cd src/github.com/siddontang/ledisdb

    make

## LevelDB support

+ Install leveldb and snappy, if you have installed, skip.

    LedisDB supplies a simple shell to install leveldb and snappy: 

        sh build_leveldb.sh

    It will default install leveldb at /usr/local/leveldb and snappy at /usr/local/snappy.

    LedisDB use the modified LevelDB for better performance, see [here](https://github.com/siddontang/ledisdb/wiki/leveldb-source-modification).

+ Set LEVELDB_DIR and SNAPPY_DIR to the actual install path in dev.sh.

+ make

## RocksDB support

todo.......

## Server Example

    ./ledis-server -config=/etc/ledis.json

    //another shell
    ledis-cli -p 6380
    
    ledis 127.0.0.1:6380> set a 1
    OK
    ledis 127.0.0.1:6380> get a
    "1"

## Package Example
    
    import "github.com/siddontang/ledisdb/ledis"
    l, _ := ledis.Open(cfg)
    db, _ := l.Select(0)

    db.Set(key, value)

    db.Get(key)


## Replication Example

Set slaveof in config or dynamiclly

    ledis-cli -p 6381 

    ledis 127.0.0.1:6381> slaveof 127.0.0.1 6380
    OK

## Benchmark

See benchmark.md for more.

## Todo

See [Issues todo](https://github.com/siddontang/ledisdb/issues?labels=todo&page=1&state=open)


## Links

+ [Official Website](http://ledisdb.com)
+ [Author's Chinese Blog](http://blog.csdn.net/siddontang/article/category/2264003)
+ [GoDoc](https://godoc.org/github.com/siddontang/ledisdb)
+ [Server Commands](https://github.com/siddontang/ledisdb/wiki/Commands)


## Thanks

Gmail: cenqichao@gmail.com

Gmail: chendahui007@gmail.com

Gmail: cppgohan@gmail.com

Gmail: tiaotiaoyly@gmail.com

Gmail: wyk4true@gmail.com


## Feedback

Gmail: siddontang@gmail.com