SSDB 替代 Redis

SSDB是一个快速的用来存储十亿级别列表数据的开源 NoSQL 数据库。

项目地址：https://github.com/ideawu/ssdb

http://ssdb.io/

特性

• 替代 Redis 数据库, Redis 的 100 倍容量
• LevelDB 网络支持, 使用 C/C++ 开发
• Redis API 兼容, 支持 Redis 客户端
• 适合存储集合数据, 如 list, hash, zset…
• 客户端 API 支持的语言包括: C++、PHP、Python、Cpy、Java、NodeJS、Ruby、Go。
• 持久化的队列服务
• 主从复制, 负载均衡

性能

1000请求：

writeseq  :    0.546 ms/op      178.7 MB/s
writerand :    0.519 ms/op      188.1 MB/s
readseq   :    0.304 ms/op      321.6 MB/s
readrand  :    0.310 ms/op      315.0 MB/s

并发：

========== set ==========
qps: 44251, time: 0.226 s
========== get ==========
qps: 55541, time: 0.180 s
========== del ==========
qps: 46080, time: 0.217 s
========== hset ==========
qps: 42338, time: 0.236 s
========== hget ==========
qps: 55601, time: 0.180 s
========== hdel ==========
qps: 46529, time: 0.215 s
========== zset ==========
qps: 37381, time: 0.268 s
========== zget ==========
qps: 41455, time: 0.241 s
========== zdel ==========
qps: 38792, time: 0.258 s

在MacBook Pro 13 （Retina屏幕）上运行。

与redis的比较：

性能数据使用 ssdb-bench(SSDB) 和 redis-benchmark(Redis) 来获取。

架构

安装

下载压缩包，解压缩

wget --no-check-certificate https://github.com/ideawu/ssdb/archive/master.zip
unzip master
cd ssdb-master

make
安装（可选）

sudo make install
运行

./ssdb-server ssdb.conf
或者以后台的方式运行

./ssdb-server -d ssdb.conf
ssdb命令行

./tools/ssdb-cli -p 8888
停止ssdb-server

kill `cat ./var/ssdb.pid`

使用

PHP

<?php
include_once('SSDB.php');
try{
    $ssdb = new SimpleSSDB('127.0.0.1', 8888);
}catch(Exception $e){
    die(__LINE__ . ' ' . $e->getMessage());
}
$ret = $ssdb->set('key', 'value');
if($ret === false){
    // error!
}
echo $ssdb->get('key');

Python

使用pyssdb

>>> import pyssdb
>>> c = pyssdb.Client()
>>> c.set('key', 'value')
1
>>> c.get('key')
'value'
>>> c.hset('hash', 'item', 'value')
1
>>> c.hget('hash', 'item')
'value'
>>> c.hget('hash', 'not exist') is None
True
>>> c.incr('counter')
1
>>> c.incr('counter')
2
>>> c.incr('counter')
3
>>> c.keys('a', 'z', 1)
['counter']
>>> c.keys('a', 'z', 10)
['counter', 'key']

Ruby

使用ssdb-rb

require "ssdb"

ssdb = SSDB.new url: "ssdb://1.2.3.4:8889"

ssdb.set("mykey", "hello world")
# => true

ssdb.get("mykey")
# => "hello world"

ssdb.batch do
  ssdb.set "foo", "5"
  ssdb.get "foo"
  ssdb.incr "foo"
end
# => [true, "5", 6]

Go

package main

import (
        "fmt"
        "os"
        "./ssdb"
       )

func main(){
    ip := "127.0.0.1";
    port := 8888;
    db, err := ssdb.Connect(ip, port);
    if(err != nil){
        os.Exit(1);
    }

    var val interface{};
    db.Set("a", "xxx");
    val, err = db.Get("a");
    fmt.Printf("%sn", val);
    db.Del("a");
    val, err = db.Get("a");
    fmt.Printf("%sn", val);

    db.Do("zset", "z", "a", 3);
    db.Do("multi_zset", "z", "b", -2, "c", 5, "d", 3);
    resp, err := db.Do("zrange", "z", 0, 10);
    if err != nil{
        os.Exit(1);
    }
    if len(resp) % 2 != 1{
        fmt.Printf("bad response");
        os.Exit(1);
    }

    fmt.Printf("Status: %sn", resp[0]);
    for i:=1; i<len(resp); i+=2{
        fmt.Printf("  %s : %3sn", resp[i], resp[i+1]);
    }
    return;

ngx_lua

使用lua-resty-ssdb

lua_package_path "/path/to/lua-resty-ssdb/lib/?.lua;;";

server {
    location /test {
        content_by_lua '
            local ssdb = require "resty.ssdb"
            local db = ssdb:new()

            db:set_timeout(1000) -- 1 sec

            local ok, err = db:connect("127.0.0.1", 8888)
            if not ok then
                ngx.say("failed to connect: ", err)
                return
            end

            ok, err = db:set("dog", "an animal")
            if not ok then
                ngx.say("failed to set dog: ", err)
                return
            end

            ngx.say("set result: ", ok)

            local res, err = db:get("dog")
            if not res then
                ngx.say("failed to get dog: ", err)
                return
            end

            if res == ngx.null then
                ngx.say("dog not found.")
                return
            end

            ngx.say("dog: ", res)

            db:init_pipeline()
            db:set("cat", "Marry")
            db:set("horse", "Bob")
            db:get("cat")
            db:get("horse")
            local results, err = db:commit_pipeline()
            if not results then
                ngx.say("failed to commit the pipelined requests: ", err)
                return
            end

            for i, res in ipairs(results) do
                if type(res) == "table" then
                    if not res[1] then
                        ngx.say("failed to run command ", i, ": ", res[2])
                    else
                        -- process the table value
                    end
                else
                    -- process the scalar value
                end
            end

            -- put it into the connection pool of size 100,
            -- with 0 idle timeout
            local ok, err = db:set_keepalive(0, 100)
            if not ok then
                ngx.say("failed to set keepalive: ", err)
                return
            end

            -- or just close the connection right away:
            -- local ok, err = db:close()
            -- if not ok then
            --     ngx.say("failed to close: ", err)
            --     return
            -- end
        ';
    }
}

C++

#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#include "SSDB.h"

int main(int argc, char **argv){
    const char *ip = (argc >= 2)? argv[1] : "127.0.0.1";
    int port = (argc >= 3)? atoi(argv[2]) : 8888;

    ssdb::Client *client = ssdb::Client::connect(ip, port);
    if(client == NULL){
        printf("fail to connect to server!n");
        return 0;
    }

    ssdb::Status s;
    s = client->set("k", "hello ssdb!");
    if(s.ok()){
        printf("k = hello ssdb!n");
    }else{
        printf("error!n");
    }

    delete client;
    return 0;
}

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