php迁移redis指定库号的实例分享

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; 
} 
?>

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