Redis compatible server framework for Go
Go to file
Josh Baker 67c21aa488 Major API update. Please see details.
The Redcon API has been changed to better reflect the wants of the
community. THIS IS A BREAKING COMMIT... sorry, it's a one time thing.

The changes include:

1. All commands and responses use []byte rather than string for data.
2. The handler signature has been changed from:
   func(conn redcon.Conn, args [][]string)
   to:
   func(conn redcon.Conn, cmd redcon.Command)
3. There's a new Reader and Writer types for reading commands and
   writing responses.

Performance remains the same.
2016-09-17 20:17:23 -07:00
example Major API update. Please see details. 2016-09-17 20:17:23 -07:00
.travis.yml added travis.yml 2016-08-20 10:42:51 -07:00
LICENSE first commit 2016-07-28 07:54:02 -07:00
README.md Major API update. Please see details. 2016-09-17 20:17:23 -07:00
logo.png fixed test 2016-08-20 09:57:29 -07:00
redcon.go Major API update. Please see details. 2016-09-17 20:17:23 -07:00
redcon_test.go Major API update. Please see details. 2016-09-17 20:17:23 -07:00

README.md

REDCON
Build Status GoDoc

Fast Redis compatible server framework for Go

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 and Tile38 projects.

Features

  • Create a Fast custom Redis compatible server in Go
  • Simple interface. One function ListenAndServe and two types Conn & Command
  • Support for pipelining and telnet commands
  • Works with Redis clients such as redigo, redis-py, node_redis, and jedis

Installing

go get -u github.com/tidwall/redcon

Example

Here's a full example of a Redis clone that accepts:

  • SET key value
  • GET key
  • DEL key
  • PING
  • QUIT

You can run this example from a terminal:

go run example/clone.go
package main

import (
	"log"
	"strings"
	"sync"

	"github.com/tidwall/redcon"
)

var addr = ":6380"

func main() {
	var mu sync.RWMutex
	var items = make(map[string][]byte)
	go log.Printf("started server at %s", addr)
	err := redcon.ListenAndServe(addr,
		func(conn redcon.Conn, cmd redcon.Command) {
			switch strings.ToLower(string(cmd.Args[0])) {
			default:
				conn.WriteError("ERR unknown command '" + string(cmd.Args[0]) + "'")
			case "ping":
				conn.WriteString("PONG")
			case "quit":
				conn.WriteString("OK")
				conn.Close()
			case "set":
				if len(cmd.Args) != 3 {
					conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
					return
				}
				mu.Lock()
				items[string(cmd.Args[1])] = cmd.Args[2]
				mu.Unlock()
				conn.WriteString("OK")
			case "get":
				if len(cmd.Args) != 2 {
					conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
					return
				}
				mu.RLock()
				val, ok := items[string(cmd.Args[1])]
				mu.RUnlock()
				if !ok {
					conn.WriteNull()
				} else {
					conn.WriteBulk(val)
				}
			case "del":
				if len(cmd.Args) != 2 {
					conn.WriteError("ERR wrong number of arguments for '" + string(cmd.Args[0]) + "' command")
					return
				}
				mu.Lock()
				_, ok := items[string(cmd.Args[1])]
				delete(items, string(cmd.Args[1]))
				mu.Unlock()
				if !ok {
					conn.WriteInt(0)
				} else {
					conn.WriteInt(1)
				}
			}
		},
		func(conn redcon.Conn) bool {
			// use this function to accept or deny the connection.
			// log.Printf("accept: %s", conn.RemoteAddr())
			return true
		},
		func(conn redcon.Conn, err error) {
			// this is called when the connection has been closed
			// log.Printf("closed: %s, err: %v", conn.RemoteAddr(), err)
		},
	)
	if err != nil {
		log.Fatal(err)
	}
}

Benchmarks

Redis: Single-threaded, no disk persistence.

$ redis-server --port 6379 --appendonly no
redis-benchmark -p 6379 -t set,get -n 10000000 -q -P 512 -c 512
SET: 941265.12 requests per second
GET: 1189909.50 requests per second

Redcon: Single-threaded, no disk persistence.

$ GOMAXPROCS=1 go run example/clone.go
redis-benchmark -p 6380 -t set,get -n 10000000 -q -P 512 -c 512
SET: 2018570.88 requests per second
GET: 2403846.25 requests per second

Redcon: Multi-threaded, no disk persistence.

$ GOMAXPROCS=0 go run example/clone.go
$ redis-benchmark -p 6380 -t set,get -n 10000000 -q -P 512 -c 512
SET: 1944390.38 requests per second
GET: 3993610.25 requests per second

Running on a MacBook Pro 15" 2.8 GHz Intel Core i7 using Go 1.7

Contact

Josh Baker @tidwall

License

Redcon source code is available under the MIT License.