如何将 redis 数据库从一台服务器移动到另一台服务器? [英] How do I move a redis database from one server to another?

问题描述

我目前有一个在云实例上运行的实时 redis 服务器，我想将此 redis 服务器迁移到一个新的云实例，并将该实例用作我的新 redis 服务器.如果是 MySQL，我会从旧服务器导出数据库并将其导入新服务器.我应该如何用 redis 做到这一点?

I currently have a live redis server running on a cloud instance and I want to migrate this redis server to a new cloud instance and use that instance as my new redis server. If it were MySQL, I would export the DB from the old server and import it into the new server. How should I do this with redis?

P.S.:我不打算设置复制.我想把redis服务器完全迁移到一个新的实例上.

P.S.: I'm not looking to set-up replication. I want to completely migrate the redis server to a new instance.

推荐答案

首先，在服务器 A 上创建一个转储.

First, create a dump on server A.

A$ redis-cli
127.0.0.1:6379> CONFIG GET dir
1) "dir"
2) "/var/lib/redis/"
127.0.0.1:6379> SAVE
OK

这确保 dump.rdb 是完全最新的，并向我们展示它的存储位置(/var/lib/redis/dump.rdb 在这个案件).dump.rdb 也会定期自动写入磁盘.

This ensures dump.rdb is completely up-to-date, and shows us where it is stored (/var/lib/redis/dump.rdb in this case). dump.rdb is also periodically written to disk automatically.

接下来，将其复制到服务器 B:

Next, copy it to server B:

A$ scp /var/lib/redis/dump.rdb myuser@B:/tmp/dump.rdb

停止B上的Redis服务器，复制dump.rdb(保证权限和之前一样)，然后启动.

Stop the Redis server on B, copy dump.rdb (ensuring permissions are the same as before), then start.

B$ sudo service redis-server stop
B$ sudo cp /tmp/dump.rdb /var/lib/redis/dump.rdb
B$ sudo chown redis: /var/lib/redis/dump.rdb
B$ sudo service redis-server start

B 上的 Redis 版本必须大于或等于 A 的版本，否则你可能会打兼容性问题.

The version of Redis on B must be greater or equal than that of A, or you may hit compatibility issues.

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