php实现redis数据库指定库号迁移

发布:smiling　来源: PHP粉丝网　添加日期：2014-09-10 09:33:25　浏览: 评论：0　

下面来一个朋友写的php实现redis数据库指定库号迁移,希望例子能给各位带来帮助.

redis普通的数据库迁移,只能整个redis save,或者利用主从,当然也可以安装一个redis-dump,不过比较麻烦,这里提供一种php的脚本,实现指定库号的迁移,其实也就是遍历根据存储类型,读出来,插入新库,效果是这样:

[root@localhost ~]# php 1.php

1/407

101/407

201/407

301/407

401/407

PHP实例代码如下:

<?php

$from = '10.0.2.52:6379/7';

$to   = '127.0.0.1:6379/7';

$from_redis = redis_init($from);

$to_redis   = redis_init($to);

$keys  = $from_redis->keys('*');

$count = 0;

$total = count($keys);

foreach($keys as $key){

    if(++$count % 100 == 1){

        echo "$count/$total＼n";

    }

    $type = $from_redis->type($key);

    switch($type){

        case Redis::REDIS_STRING:

            $val = $from_redis->get($key);

            $to_redis->set($key, $val);

            break;

        case Redis::REDIS_LIST:

            $list = $from_redis->lRange($key, 0, -1);

            foreach($list as $val){

                $to_redis->rPush($key, $val);

            }

            break;

        case Redis::REDIS_HASH:

            $hash = $from_redis->hGetAll($key);

            $to_redis->hMSet($key, $hash);

            break;

        case Redis::REDIS_ZSET:

            $zset = $from_redis->zRange($key, 0, -1, true);

            foreach($zset as $val=>$score){

                $to_redis->zAdd($key, $score, $val);

            }

            break;

    }

}

function redis_init($conf){

//开源代码phpfensi.com

    $redis = new Redis();

    preg_match('/^([^:]+)(:[0-9]+)?＼＼/(.+)?/', $conf, $ms);

    $host = $ms[1];

    $port = trim($ms[2], ':');

    $db = $ms[3];

    $redis->connect($host, $port);

    $redis->select($db);

    return $redis;

}

?>