Make a Local Full Backup (Create, Prepare and Restore)¶
Create the Backup¶
This is the simplest use case. It copies all your MySQL data into the specified directory. Here is how to make a backup of all the databases in the datadir specified in your my.cnf. It will put the backup in a time stamped subdirectory of /data/backups/, in this case, /data/backups/2010-03-13_02-42-44,
$ innobackupex /data/backups
There is a lot of output, but you need to make sure you see this at the end of the backup. If you don’t see this output, then your backup failed:
100313 02:43:07 innobackupex: completed OK!
Prepare the Backup¶
To prepare the backup use the innobackupex --apply-log option and specify the timestamped subdirectory of the backup. To speed up the apply-log process, use the innobackupex --use-memory:
$ innobackupex --use-memory=4G --apply-log /data/backups/2010-03-13_02-42-44/
You should check for a confirmation message:
100313 02:51:02 innobackupex: completed OK!
Now the files in /data/backups/2010-03-13_02-42-44 is ready to be used by the server.
Restore the Backup¶
To restore the already-prepared backup, first stop the server and then use the innobackupex --copy-back function of innobackupex:
$ innobackupex --copy-back /data/backups/2010-03-13_02-42-44/
## Use chmod to correct the permissions, if necessary!
This will copy the prepared data back to its original location as defined by the datadir in your my.cnf.
Note
The datadir must be empty; Percona XtraBackup innobackupex --copy-back option will not copy over existing files unless innobackupex --force-non-empty-directories option is specified. Also it’s important to note that MySQL server needs to be shut down before restore is performed. You can’t restore to a datadir of a running mysqld instance (except when importing a partial backup).
After the confirmation message:
100313 02:58:44 innobackupex: completed OK!
you should check the file permissions after copying the data back. You may need to adjust them with something like:
$ chown -R mysql:mysql /var/lib/mysql
Now the datadir contains the restored data. You are ready to start the server.