php实现redis数据库指定库号迁移的方法

本文实例讲述了php实现redis数据库指定库号迁移的方法,分享给大家供大家参考。具体如下：

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){ 

    $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; 

} 

?>

希望本文所述对大家的php程序设计有所帮助。