forked from mirror/redcon
172 lines
4.2 KiB
Markdown
172 lines
4.2 KiB
Markdown
<p align="center">
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<img
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src="logo.png"
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width="336" height="75" border="0" alt="REDCON">
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<br>
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<a href="https://travis-ci.org/tidwall/redcon"><img src="https://img.shields.io/travis/tidwall/redcon.svg?style=flat-square" alt="Build Status"></a>
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<a href="https://godoc.org/github.com/tidwall/redcon"><img src="https://img.shields.io/badge/api-reference-blue.svg?style=flat-square" alt="GoDoc"></a>
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</p>
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<p align="center">Fast Redis compatible server framework for Go</p>
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Redcon is a custom Redis server framework for Go that is fast and simple to use. The reason for this library it to give an efficient server front-end for the [BuntDB](https://github.com/tidwall/buntdb) and [Tile38](https://github.com/tidwall/tile38) projects.
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Features
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--------
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- Create a [Fast](#benchmarks) custom Redis compatible server in Go
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- Simple interface. One function `ListenAndServe` and two types `Conn` & `Command`
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- Support for pipelining and telnet commands
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- Works with Redis clients such as [redigo](https://github.com/garyburd/redigo), [redis-py](https://github.com/andymccurdy/redis-py), [node_redis](https://github.com/NodeRedis/node_redis), and [jedis](https://github.com/xetorthio/jedis)
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Installing
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----------
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```
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go get -u github.com/tidwall/redcon
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```
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Example
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-------
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Here's a full example of a Redis clone that accepts:
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- SET key value
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- GET key
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- DEL key
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- PING
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- QUIT
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You can run this example from a terminal:
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```sh
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go run example/clone.go
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```
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```go
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package main
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import (
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"log"
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"strings"
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"sync"
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"github.com/tidwall/redcon"
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)
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var addr = ":6380"
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func main() {
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var mu sync.RWMutex
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var items = make(map[string][]byte)
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go log.Printf("started server at %s", addr)
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err := redcon.ListenAndServe(addr,
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func(conn redcon.Conn, cmd redcon.Command) {
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switch strings.ToLower(string(cmd.Args[0])) {
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default:
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conn.WriteError("ERR unknown command '" + string(cmd.Args[0]) + "'")
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case "ping":
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conn.WriteString("PONG")
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case "quit":
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conn.WriteString("OK")
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conn.Close()
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case "set":
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if len(cmd.Args) != 3 {
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conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
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return
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}
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mu.Lock()
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items[string(cmd.Args[1])] = cmd.Args[2]
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mu.Unlock()
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conn.WriteString("OK")
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case "get":
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if len(cmd.Args) != 2 {
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conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
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return
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}
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mu.RLock()
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val, ok := items[string(cmd.Args[1])]
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mu.RUnlock()
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if !ok {
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conn.WriteNull()
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} else {
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conn.WriteBulk(val)
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}
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case "del":
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if len(cmd.Args) != 2 {
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conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
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return
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}
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mu.Lock()
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_, ok := items[string(cmd.Args[1])]
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delete(items, string(cmd.Args[1]))
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mu.Unlock()
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if !ok {
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conn.WriteInt(0)
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} else {
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conn.WriteInt(1)
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}
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}
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},
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func(conn redcon.Conn) bool {
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// use this function to accept or deny the connection.
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// log.Printf("accept: %s", conn.RemoteAddr())
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return true
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},
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func(conn redcon.Conn, err error) {
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// this is called when the connection has been closed
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// log.Printf("closed: %s, err: %v", conn.RemoteAddr(), err)
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},
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)
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if err != nil {
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log.Fatal(err)
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}
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}
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```
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Benchmarks
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----------
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**Redis**: Single-threaded, no disk persistence.
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```
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$ redis-server --port 6379 --appendonly no
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```
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```
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redis-benchmark -p 6379 -t set,get -n 10000000 -q -P 512 -c 512
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SET: 941265.12 requests per second
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GET: 1189909.50 requests per second
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```
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**Redcon**: Single-threaded, no disk persistence.
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```
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$ GOMAXPROCS=1 go run example/clone.go
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```
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```
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redis-benchmark -p 6380 -t set,get -n 10000000 -q -P 512 -c 512
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SET: 2018570.88 requests per second
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GET: 2403846.25 requests per second
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```
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**Redcon**: Multi-threaded, no disk persistence.
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```
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$ GOMAXPROCS=0 go run example/clone.go
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```
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```
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$ redis-benchmark -p 6380 -t set,get -n 10000000 -q -P 512 -c 512
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SET: 1944390.38 requests per second
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GET: 3993610.25 requests per second
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```
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*Running on a MacBook Pro 15" 2.8 GHz Intel Core i7 using Go 1.7*
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Contact
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-------
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Josh Baker [@tidwall](http://twitter.com/tidwall)
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License
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-------
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Redcon source code is available under the MIT [License](/LICENSE).
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