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

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

• Rich data structure: KV, List, Hash, ZSet, Bitmap, Set.
• Stores lots of data, over the memory limit.
• Various backend database to use: LevelDB, goleveldb, LMDB, RocksDB, BoltDB, HyperLevelDB.
• Supports expiration and ttl.
• Redis clients, like redis-cli, are supported directly.
• Multiple client API supports, 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.
• Supplies tools to load, dump, repair database.

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

#set build and run environment 
source dev.sh

make
make test

• Install leveldb and snappy.

  LedisDB supplies a simple script to install leveldb and snappy:

    sh build_tool/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.

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

• make

• Install rocksdb(make shared_lib) and snappy first.

  LedisDB has not supplied a simple script to install, maybe later.

• Set ROCKSDB_DIR and SNAPPY_DIR to the actual install path in dev.sh.

• make

• Install hyperleveldb and snappy first.

  LedisDB has not supplied a simple script to install, maybe later.

• Set HYPERLEVELDB and SNAPPY_DIR to the actual install path in dev.sh.

• make

LedisDB now supports goleveldb, lmdb, leveldb, rocksdb, boltdb, hyperleveldb. it will choose goleveldb as default to store data if you not set.

Choosing a store database to use is very simple, you have two ways:

• Set in server config file

    db_name = "leveldb"
  

• Set in command flag

    ledis-server -config=/etc/ledis.conf -db_name=leveldb
  

  Flag command set will overwrite config set.

Caveat

You must known that changing store database runtime is very dangerous, LedisDB will not guarantee the data validation if you do it.

LedisDB uses toml as the preferred configuration format, also supports json because of some history reasons. The basic configuration ./etc/ledis.conf in LedisDB source may help you.

If you don't use a configuration, LedisDB will use the default for you.

//set run environment if not
source dev.sh

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

//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"

//use curl
curl http://127.0.0.1:11181/SET/hello/world
→ {"SET":[true,"OK"]}

curl http://127.0.0.1:11181/0/GET/hello?type=json
→ {"GET":"world"}

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

db.Set(key, value)

db.Get(key)

Set slaveof in config or dynamiclly

ledis-cli -p 6381 

ledis 127.0.0.1:6381> slaveof 127.0.0.1 6380
OK

See benchmark for more.

See Issues todo

• Official Website
• GoDoc
• Server Commands

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Gmail: siddontang@gmail.com