MySQL Enterprise Backup User's Guide (Version 8.0.40)
Tape drives are affordable, high-capacity storage devices for backup data. MySQL Enterprise Backup can interface with media management software (MMS) such as Oracle Secure Backup (OSB) to drive MySQL backup and restore jobs. The media management software must support Version 2 or higher of the System Backup to Tape (SBT) API.
On the MySQL Enterprise Backup side, you run the backup job as a single-file backup
using the --backup-image parameter,
with the prefix sbt: in front of the filename,
and optionally pass other --sbt-* parameters to
mysqlbackup to control various aspects of the
SBT processing. The --sbt-* options are listed in
Section 20.9, “Single-File Backup Options”.
On the OSB side, you can schedule MySQL Enterprise Backup jobs by specifying a
configurable command that calls mysqlbackup.
You control OSB features such as encryption by defining a
“storage selector” that applies those features to a
particular backup, and passing the name of the storage selector to
OSB using the MySQL Enterprise Backup parameter
--sbt-database-name=.
storage_selector
To back up MySQL data to tape:
Specify the
--backup-image=sbt:
parameter of mysqlbackup to uniquely
identify the backup data. The namesbt:
prefix sends the backup data to the MMS rather than a
local file, and the remainder of the argument value is
used as the unique backup name within the MMS.
Specify the
--sbt-database-name parameter
of mysqlbackup to enable the OSB
operator to configure a storage selector for backups from
this MySQL source. (This parameter refers to a
“storage selector” defined by the OSB
operator, not to any MySQL database name.) By default,
mysqlbackup supplies a value of
MySQL for this MMS parameter. The
argument to this option is limited to 8 bytes.
If you have multiple media management programs installed,
to select the specific SBT library to use, specify the
--sbt-lib-path parameter of
the mysqlbackup command. If you do not
specify the --sbt-lib-path
parameter, mysqlbackup uses the normal
operating system paths and environment variables to locate
the SBT library, which is named
libobk.so on Linux and Unix systems and
ORASBT.DLL on Windows systems. When you
specify --sbt-lib-path, you
can use a different filename for the library in addition
to specifying the path.
Specify any other product-specific settings that are
normally controlled by environment variables using the
--sbt-environment option.
Each time an online backup is made to a tape using the SBT API ,
besides recording the backup in the
mysql.backup_history and the
mysql.backup_progress tables, an entry is also
made to the mysql.backup_sbt_history table on
the backed up MySQL instance. That facilitates the management of
tape backups by allowing easy look-ups for information on them.
The definition of the backup_sbt_history
table is shown below:
mysql> DESCRIBE `backup_sbt_history`;
+--------------------+---------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------------+---------------+------+-----+---------------------+----------------+
| id | int | NO | PRI | NULL | auto_increment |
| backup_id | bigint | NO | | NULL | |
| backup_file_name | varchar(4096) | NO | | NULL | |
| file_creation_time | timestamp | NO | | 0000-00-00 00:00:00 | |
| file_expiry_time | timestamp | NO | | 0000-00-00 00:00:00 | |
| volume_label | varchar(64) | NO | | NULL | |
| sbt_error_msg | varchar(4096) | NO | | NULL | |
| sbt_error_code | int | NO | | NULL | |
+--------------------+---------------+------+-----+---------------------+----------------+
Here are the descriptions for the fields in the table:
id: Auto-increment primary key for the
table.
backup_id: The backup's ID, which is also
recorded in the backup's entries in the
mysql.backup_history and the
mysql.backup_progress tables.
backup_file_name: The file name provided
by the user through the
--backup-image=sbt:
option.
name
file_creation_time: Creation date and
time for the tape backup.
file_expiry_time: Expiration date and
time for the tape backup.
volume_label: Volume label for the
physical medium which contains the tape backup.
sbt_error_msg: Error message, when an
error occurs while retrieving information for the tape
backup.
sbt_error_code: Error code, when an error
occurs while retrieving information for the tape backup.
Multiple entries, one for each volume label, are created in the
mysql.backup_sbt_history table, if the backup
is split across multiple volumes.
Here are some sample entries in the
mysql.backup_sbt_history table:
mysql> SELECT * FROM mysql.backup_sbt_history; +----+-------------------+------------------+---------------------+---------------------+-----------------+---------------+----------------+ | id | backup_id | backup_file_name | file_creation_time | file_expiry_time | volume_label | sbt_error_msg | sbt_error_code | +----+-------------------+------------------+---------------------+---------------------+-----------------+---------------+----------------+ | 1 | 15921945689894983 | backup_img1.msb | 2020-06-15 07:16:09 | 2020-06-15 07:16:09 | /sbt_bup_dir | | 0 | | 2 | 15921945689894983 | backup_img1.msb | 2020-06-15 07:16:09 | 2020-06-15 07:16:09 | backup_img1.msb | | 0 | +----+-------------------+------------------+---------------------+---------------------+-----------------+---------------+----------------+ 2 rows in set (0.00 sec)
A backup to tape always uses one write thread.
To restore MySQL data from tape:
Specify the
--backup-image=sbt:
parameter of mysqlbackup as part of the
restore operation. Use the same
namename value which was used
during the backup. This single parameter retrieves the
appropriate data from the appropriate tape device.
Optionally use the
--sbt-lib-path option, using
the same value as for the backup operation.
Specify any other product-specific settings that are
normally controlled by environment variables using the
--sbt-environment option.
For product-specific information about Oracle Secure Backup, see the Oracle Secure Backup documentation.
Example 11.1 Sample mysqlbackup Commands Using MySQL Enterprise Backup with Oracle Secure Backup
# Uses libobk.so or ORASBT.DLL, at standard locations: mysqlbackup --port=3306 --protocol=tcp --user=root --password \ --backup-image=sbt:backup-shoeprod-2011-05-30 \ --backup-dir=/backup backup-to-image # Associates this backup with storage selector 'shoeprod': mysqlbackup --port=3306 --protocol=tcp --user=root --password \ --backup-image=sbt:backup-shoeprod-2011-05-30 \ --sbt-database-name=shoeprod \ --backup-dir=/backup backup-to-image # Uses an alternative SBT library, /opt/Other-MMS.so: mysqlbackup --port=3306 --protocol=tcp --user=root --password \ --backup-image=sbt:backup-shoeprod-2011-05-30 \ --sbt-lib-path=/opt/Other-MMS.so \ --backup-dir=/backup backup-to-image