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October 16, 2018 11:57
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dump.rdb
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| https://stackoverflow.com/questions/6004915/how-do-i-move-a-redis-database-from-one-server-to-another | |
| Save a spanshot of the database into a dump.rdb by either running BGSAVE or SAVE from the command line. This will create a file named dump.rdb in the same folder as your redis server. See a list of all server commands. | |
| Copy this dump.rdb to the other redis server you want to migrate to. When redis starts up, it looks for this file to initialize the database from | |
| --- | |
| 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 | |
| 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. | |
| Next, copy it to server B: | |
| A$ scp /var/lib/redis/dump.rdb myuser@B:/tmp/dump.rdb | |
| 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 | |
| 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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better master-slave approach: https://redis4you.com/articles.php?id=005&name=Seamless+migration+from+one+Redis+server+to+another