Archive:SEP sesam extension for Ingres
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SEP sesam extension for Ingres provides the following functions:
- Interface for chkdb and rollforward commands to use SEP sesam as media manager (instead of using tar)
- Complete database backup over Sesam GUI. This includes backup of data, journal and dump directories
- Complete disaster restore of database
- Supported Versions
- SEP sesam Server >= 188.8.131.52
- SEP sesam extension for Ingres DB
- Previous installation of the standard Sesam Backup Client
- working Sesam file system backup for this client
- First, verify that the standard Sesam Backup Client is already installed
- File system backup must be active for this SEP sesam Client
- Login as root user
- Unpack the file sesam_ingres_x.x.x.x.tgz in a temporary location
- Copy ingres/sbc_ingres into $<$SESAM_ROOT$>$/bin/sesam directory
root@db:~> cd /tmp root@db:/tmp> tar xvzf sesam_ingres.tgz root@db:/tmp> cp sesam_ingres_184.108.40.206/sbc_ingres /opt/sesam/bin/sesam
Complete database backup
In this case SEP sesam calls the Ingres executable ckpdb to perform a checkpoint. After saving all files of the checkpoint, a backup of the directories dump and journal is made. With this information a complete disaster recovery of a database is possible.
The backup source has the following format:
<db name>@<path of config file> . test2@/opt/Ingres/IngresII/ingres/data/default/test2/aaaaaaaa.cnf
|Backup source has to be entered manually|
In the current version, it is not possible to use the GUI file system browser to choose the backup source
Additional backup options
You can enter additional options for the tasks in Options 1->Save options by -a switch:
- Delete the last checkpoint after the backup
- Delete all checkpoints after the backup
- dbuser=<ingres os user>
- Use this OS account instead of the default user ingres
Uses the user ingres2 for the backup and deletes all checkpoints after a successful backup
In this case SEP sesam acts as a Media Manager. Instead of the default tar command, database files are directly saved by SEP sesam Server. To use SEP sesam as a media manager an adopted check point template file has to be created:
- Create a copy of the Default Template File:
cp /opt/Ingres/IngresII/ingres/files/cktmpl.def /opt/Ingres/IngresII/ingres/files/cktmpl_sm.def
- Adopt the template file:
old: WSDD: cd %D; /bin/tar cf %A * new: WSDD: cd %D; /opt/sesam/bin/sesam/sbc_ingres ckpdb -b -j ingres -S barometrix -m LARGE %D %A
old: WRDD: cd %D; /bin/tar xf %A new: WRDD: cd %D; /opt/sesam/bin/sesam/sbc_ingres rollforward -r -j ingres -S barometrix %D %A
The task (-j) has to be created in the SEP sesam GUI as described earlier.
- Set the environment variable II_CKTMPL_FILE:
Certainly the Default Template can be adopted as well but then SEP sesam is always used for creating checkpoints.
The filename cktmpl_seseam.def is reserved because SEP sesam uses it internally.
|Checkpoint is not sufficient for disaster recovery|
If you only create checkpoints make sure that the directories dump and journal are saved by normal file system backups
- The database must exist before it can be recovered
- SEP sesam backup log can help you to identify the data locations
If a complete backup was done with SEP sesam all necessary files can be restored with the SEP sesam GUI. In the restore wizard the backup of the configuration file has to be used, not the external checkpoint backup.
Select complete restore of selected task
- Overwrite all exiting files
- Auto recover after restore
- Starts rollforward command after data restore
- Auto recover and online after restore
- Starts rollforward command after data restore
Hint: There is no difference between the two Auto recover options in case of an Ingres restore
- Point in time recover
- checkpoint=<checkpoint number>
- Using this checkpoint for recover
File system restore
As data is saved in files these files can be restored into the file system. To do this, select a new target in restore wizard starting with /. There will be no Ingres specific processing in this case.
Restore all files into