SEP sesam Extension for MySQL
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- 1 Introduction
- 2 Prerequisites
- 3 Installation SEP sesam Client 3.4
- 4 Installation since Sesam Client 3.6
- 5 Backup Configuration
- 6 Restore Configuration
- 7 Backup configuration for special MySQL 5.0 features (Stored Procedures, Triggers)
- 8 Troubleshooting
- 9 Further Links/Literature
The SEP sesam extension for MySQL and MariaDB allows an online backup of one or more MySQL databases at run time. This includes the backup and restore of one or all databases of a MySQL database server. For backup the MySQL backup program mysqldump and for restore the program mysql will be used. Only the programs of the database manufacturer can guarantee that the data can backup in a consistent status.
All database backup options in the documentation are neither parts nor components of SEP sesam. These are only recommendations and examples of how you can backup a MySQL database. There are many different fields of application for using a MySQL database. Therefore we can only show a few parameters to using during backup. Additional information of MySQL backup policies and strategies please see the MySQL documentation and the man pages of mysqldump und mysql.
- Supported Versions
- SEP sesam Server version >= 3.4.1.X; check Hardware requirements for SEP sesam Server or RDS.
- SEP sesam Client >= 126.96.36.199 on the MySQL database host
- SEP sesam Extension for MySQL only, if the version of the installed SEP sesam Client < 3.6. The SEP sesam Client >= version 3.6 already includes the MySQL extension. In this case the installation steps can be skipped.
- Windows: The path of the MySQL executables must be part of the Windows system PATH variable, e.g. 'PATH=%PATH%;C:\Program Files\MySQL\MySQL Server 5.6\bin'.
- Functioning SEP sesam file system backup
Installation SEP sesam Client 3.4
The RPM installation is the privileged installation method of the MySQL extension.
- Please make sure that the SEP sesam Client RPM is already installed
- A path backup has to be possible with this client
Install or update the SEP sesam MySQL online extension by:
rpm -Uhv sesam_mysql-3.4.1-100.i386.rpm
- Be sure that the SEP sesam Client is already installed
- A path backup has to be possible with this client
- Log in as user root
- Unpack the Tarball to a temporary location (e.g. /tmp
- Copy the MySQL components to binary directory of the SEP sesam Client
cd /tmp tar xvzf sesam-mysql.tgz cp /tmp/sesam-mysql/* /opt/sesam/bin/sesam/
Installation since Sesam Client 3.6
Since SEP sesam Client 3.6 the MySQL Extension is included in the Client package, no further extensions have to be installed!
The configuration will be executed in the SEP sesam GUI.
- Create a new backup task.
- Select MySQL as Task type.
- Enter the MySQL database name in the field Source.
- On the page Options 1 you can define additional parameters for backup and restore. Details described in the section "Backup & Restore".
It is recommend setting the user and password options of restore to the same values as the backup options. If necessary you can set the restore options in the Restore Wizard at the time of restore.
- As Source you can enter the following values:
Backup of single database (e.g. my_db) Watched: the database name has to be entered case sensitive
Backup of a single database (e.g. DB:my_db). The difference to the statement above in the backed up dump is that a CREATE DATABASE statement will be inserted
Backup of all databases of the MySQL server
- On the page Options 1 you can define additional parameters for backup and restore
Here are some examples:
- To set user and password to log on at the database:
-a user=<DBuser>,password=<password of DBuser>
- Login information can also be specified in /etc/my.cnf on client side (this is also necessary to browse the database):
root@mysql:~# cat /etc/my.cnf [client] user=root password=secret root@mysql:~#
- It may also possible to use configuration files, e.g.
%WINDIR%\my.cnf(see Using a configuration file to store the password).
[client] user=root password=secret
- Another config file can be specified by setting --defaults-file variable
The previous configuration of the username and password by entries in the sm.ini-file of the client is not necessary anymore. These settings will be executed in the SEP sesam GUI.
b) For a better throughput during backup of MySQL database type ISAM. Do not use this option for InnoDB:
c) For a consistent backup of a MySQL database of type InnoDB:
d) You can combine different parameters into one statement:
A restore will be started by calling the restore wizard. First, select the backup job, then the period of time and then select the desired backup job for restore. There are 2 options:
- No recover after restore
The restore stores the data as a Dump file in the SEP sesam Work directory (usually
/var/opt/sesam/var/workof the SEP sesam Client or in older versions in
/opt/sesam/bin/sesam). The name of the file comprise of the prefix mysql-, the Saveset-ID and the suffix .tmp. This file can import into the database by MySQL command mysql.
Example: mysql < /var/opt/sesam/var/work/mysql-SF20081128224529.tmp
- Auto recover after restore
The data will be stored directly into the database without caching in the file system.
If you use the option Auto recover after restore the database has to exist already, if not the restore will fail. Also, set the option overwrite existing files to overwrite an existing database.
If the CREATE DATABASE Statement is not in the backed up data, the data can only be restored into the same database. It's not possible to change the restore target.
In the case of a restore to a different database only the option no recover after restore is possible. Then you can edit the Dump file in the file system manually and import it as described above.
Single DB Restore
To be able to restore single DBs from a mySQL Server you have to consider these preconditions:
- For each mySQL DB there must be configured a separate backup task (the DB tasks can be started as a group)
- With the mySQL "all" backup you can currently only restore all DBs.
Backup configuration for special MySQL 5.0 features (Stored Procedures, Triggers)
By default the SEP sesam software does not backup Stored Procedures or defined Triggers. However, it is also possible to use the SEP sesam backup client for backing up the Stored Procedures and Triggers defined in a database.
The can be enabled in the task properties from a backup job.
Backup Stored Procedures
The following example shows how to backup Stored Procedures with SEP sesam. Switch to Options 1 from the task and add
in the additional save options field, like shown in this screenshot:
Backup defined Triggers
Just like Stored Procedures, it is also possible to add additional options to enable Triggers. Add the parameter
like shown in this screenshot:
Of course it is also possible to define multiple statements, backing up both Stored Procedures and Triggers with:
-a routines -a triggers
For troubleshooting MySQL issues, see Troubleshooting MySQL Backup.