php实现redis数据库指定库号迁移

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 = &#39;10.0.2.52:6379/7&#39;; 
$to   = &#39;127.0.0.1:6379/7&#39;; 
$from_redis = redis_init($from); 
$to_redis   = redis_init($to); 
$keys  = $from_redis->keys(&#39;*&#39;); 
$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(&#39;/^([^:]+)(:[0-9]+)?\\/(.+)?/&#39;, $conf, $ms); 
    $host = $ms[1]; 
    $port = trim($ms[2], &#39;:&#39;); 
    $db = $ms[3]; 
    $redis->connect($host, $port); 
    $redis->select($db); 
    return $redis; 
}