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 = '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;
- }
- ?>