怎样实现两台redis服务器的数据迁移

Tools::realTimeOutputPrepare();
		//获取新服务器的redis连接
        $newRedis = new Redis(['XXX'], [
            'auth'      => '***',
            'keyPrefix' => '***:'
        ]);
		//获取旧服务器的redis连接
        $oldRedis = new Redis(['XXX'], [
            'auth'      => '***',
            'keyPrefix' => '***:'
        ]);
        //获取指定前缀的所有key
        $oldList = $oldRedis->keys('session_*');
        $index = 1;
        $oldList = $oldList['***'];
        foreach($oldList as $tempKey){
            if(!$newRedis->exists($tempKey)){//避免多次执行时相互覆盖了新数据,所以如果存在则跳过
                $newRedis->set($tempKey, $oldRedis->get($tempKey));
                Tools::realTimeOutput('同步第'.$index++.'个key:'.$tempKey);
            }
        }