从线上拉取redis大value值
##获取需要的值存入文件
<?php
$redis = new Redis();
$redis->connect('10.19.112.2',6739);
$key = "city:all";
echo $key . "\n";
$arList = $redis->get($key);
$myfile = fopen("cityfile.txt", "w") or die("Unable to open file!");
fwrite($myfile, $arList);
fclose($myfile);
##将获取的值导入本地的redis
cat cityfile.txt |~/redis_6688/bin/redis-cli -h 127.0.0.1 -p 6688 -x set city:all