使用 MIGRATE 复制 Redis 数据库中的所有键 [英] Copying all keys in Redis database using MIGRATE

问题描述

是否可以使用 MIGRATE 将所有密钥从一个 Redis 实例复制到另一个远程实例?我试过 COPY、REPLACE 和 KEYS 没有任何运气.每次我收到 NOKEY 响应时.如果我用一个键使用任何 MIGRATE 命令，它就可以工作.

Is it possible to copy all keys from one Redis instance to another remote instance using MIGRATE? I've tried COPY, REPLACE and KEYS without any luck. Each time I get a NOKEY response. If I use any of the MIGRATE commands with a single key it works.

示例:

MIGRATE my.redis 6379 "*" 0 5000 REPLACE // NOKEY
MIGRATE my.redis 6379 "*" 0 5000 COPY // NOKEY
MIGRATE my.redis 6379 "" 0 5000 KEYS * // NOKEY

MIGRATE my.redis 6379 "" 0 5000 KEYS test // OK

推荐答案

这是对答案的改进@ezain 因为我无法发表评论.该命令使用正确的 redis 语法来处理成批的键，但是 xargs 的参数导致该命令为每个键调用一次，而不是只包含所有键一次(这意味着它将完成所需的时间要多得多).以下在所有情况下都会更快:

This is an improvement on the answer provided by @ezain since I am unable to post comments. The command uses the correct redis syntax for processing batches of keys, but the arguments to xargs result in the command being called once for every key instead of just once with all the keys included (which means it'll take much more time to complete than is necessary). The following will be much faster in all cases:

redis-cli --raw KEYS '*' |xargs redis-cli 迁移 my.redis 6379 "" 0 5000 KEYS

如果目的地受密码保护:

If the destination is password protected:

• redis-cli --raw KEYS '*' |xargs redis-cli MIGRATE my.redis 6379 "" 0 5000 AUTH password-here KEYS

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