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85 lines
2.2 KiB
85 lines
2.2 KiB
6 years ago
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# NoDB
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[中文](https://github.com/lunny/nodb/blob/master/README_CN.md)
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Nodb is a fork of [ledisdb](https://github.com/siddontang/ledisdb) and shrink version. It's get rid of all C or other language codes and only keep Go's. It aims to provide a nosql database library rather than a redis like server. So if you want a redis like server, ledisdb is the best choose.
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Nodb is a pure Go and high performance NoSQL database library. It supports some data structure like kv, list, hash, zset, bitmap, set.
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Nodb now use [goleveldb](https://github.com/syndtr/goleveldb) as backend to store data.
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## Features
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+ Rich data structure: KV, List, Hash, ZSet, Bitmap, Set.
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+ Stores lots of data, over the memory limit.
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+ Supports expiration and ttl.
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+ Easy to embed in your own Go application.
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## Install
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go get github.com/lunny/nodb
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## Package Example
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### Open And Select database
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```go
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import(
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"github.com/lunny/nodb"
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"github.com/lunny/nodb/config"
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)
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cfg := new(config.Config)
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cfg.DataDir = "./"
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dbs, err := nodb.Open(cfg)
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if err != nil {
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fmt.Printf("nodb: error opening db: %v", err)
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}
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db, _ := dbs.Select(0)
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```
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### KV
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KV is the most basic nodb type like any other key-value database.
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```go
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err := db.Set(key, value)
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value, err := db.Get(key)
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```
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### List
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List is simply lists of values, sorted by insertion order.
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You can push or pop value on the list head (left) or tail (right).
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```go
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err := db.LPush(key, value1)
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err := db.RPush(key, value2)
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value1, err := db.LPop(key)
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value2, err := db.RPop(key)
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```
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### Hash
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Hash is a map between fields and values.
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```go
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n, err := db.HSet(key, field1, value1)
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n, err := db.HSet(key, field2, value2)
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value1, err := db.HGet(key, field1)
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value2, err := db.HGet(key, field2)
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```
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### ZSet
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ZSet is a sorted collections of values.
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Every member of zset is associated with score, a int64 value which used to sort, from smallest to greatest score.
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Members are unique, but score may be same.
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```go
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n, err := db.ZAdd(key, ScorePair{score1, member1}, ScorePair{score2, member2})
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ay, err := db.ZRangeByScore(key, minScore, maxScore, 0, -1)
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```
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## Links
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+ [Ledisdb Official Website](http://ledisdb.com)
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+ [GoDoc](https://godoc.org/github.com/lunny/nodb)
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+ [GoWalker](https://gowalker.org/github.com/lunny/nodb)
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## Thanks
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Gmail: siddontang@gmail.com
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