MySQL Enterprise Backup User's Guide (Version 9.5.0)
--use-tts
Option
The mysqlbackup commands to perform a restore
operation are copy-back-and-apply-log
and copy-back (for directory backup
only; see Section 5.1.7, “Advanced: Preparing and Restoring a Directory Backup”). Normally, the
restoration process requires the database server to be already
shut down (or, at least not operating on the directory you are
restoring the data to), except for a
partial restore. The
process copies the data files, logs, and other backed-up files
from the backup directory back to their original locations, and
performs any required post-processing on them.
Example 5.1 Restoring a Database Server
mysqlbackup --defaults-file=<my.cnf> -uroot --backup-image=<image_name> \ --backup-dir=<backupTmpDir> --datadir=<restoreDir> copy-back-and-apply-log
The copy-back-and-apply-log command
achieves two things:
Extracts the backup from the image file and copies it to the data directory on the server to be restored.
Performs an apply log operation to the restored data to bring them up-to-date.
See Section 4.2.4, “Restoring a Database” for an explanation of
the important options used in a restore operation like
--defaults-file,
--datadir,
--backup-image, and
--backup-dir.
The restored data includes the backup_history
table, where MySQL Enterprise Backup records details of each backup. The table
allows you to perform future incremental backups using the
--incremental-base= option.
history:{last_backup
| last_full_backup}
When performing a restore, make sure the target directories
for restore data are all clean, containing no old or
unwanted data files (this might require manual removal of
files at the locations specified by the
--datadir,
--innodb_data_home_dir,
--innodb_log_group_home_dir, and
--innodb_undo_directory
options). The same cleanup is not required for partial
restores, for which other requirements described in
Section 5.1.4, “Table-Level Recovery (TLR)” apply.
After a full restore, depending on how you are going to
start the restored server, you might need to adjust the
ownership of the restored data directory. For example, if
the server is going to be started by the user
mysql, use the following command to
change the owner attribute of the data directory and the
files under it to the mysql user, and the
group attribute to the mysql group.
$ chown -R mysql:mysql /path/to/datadirThe following subsections describe a number of different scenarios for restoring a backup.