Operating Systems: AIX, HP-UX, Linux, Solaris, Windows, z/OS
Configure a checkpoint
Repository checkpoints represent saved images of the repository before configuration changes are made and can be used to restore the configuration repository back to a prior state. Checkpoints are either full or delta images. A full checkpoint is created manually by the administrator and is a copy of the entire configuration repository. This includes applications and connectors. Delta checkpoints are optional and are not enabled by default. A delta checkpoint is created automatically when configuration changes are made. The delta checkpoint is formed by making a copy of the configuration documents affected by the configuration change before changes are actually applied.
Before you begin
If you are a user with either a monitor or an operator role, you can only view the repository checkpoint information. If you are a user with either a configurator or an administrator role, you have all configuration privileges for repository checkpoints.
Ensure that you have an adequate number of open file descriptors available. The default number of open files setting is 2000, which is typically sufficient for most applications. If the value set for this parameter is too low, errors might occur when opening files or establishing connections. Because this value limits the number of file descriptors that a server process might open, a value that is too low prevents optimum performance. See Tuning operating systems for more information.
About this task
To create a full checkpoint, from the administrative console, click System Administration > Extended Repository Service > under Additional Properties > Repository Checkpoints. On this page you can create, delete, and restore checkpoints.
Procedure
- Select New. You will be prompted for confirmation before proceeding. While the checkpoint is being created, the repository is locked. You will have read access only to configuration data while the checkpoint is being created. Any attempt to make a configuration change during this period will fail.
- Name the checkpoint.
- Type a checkpoint description.
- Click OK to create a full checkpoint.
- Click Extended repository service to return to the Configuration page.
- To create a delta checkpoint, select the Enable automatic repository checkpoints box and define the number of delta checkpoints that you want to keep in the Automatic Checkpoint Depth field .
- Click Apply or OK.
Results
You configured a checkpoint to back up copies of files from the master configuration repository. If you created a full checkpoint, you made a complete copy of the entire configuration repository. If you enabled delta checkpoints, subset snapshots of the configuration repository are created when you make a change to the configuration.
What to do next
To undo recent changes, restore delta checkpoints in the reverse order in which they were created. If you created a full checkpoint, you can restore the entire configuration repository back to the state it was in at the time the full checkpoint was made.
Related concepts
The repository checkpoint and restore function
Related tasks
Restoring a checkpoint
Related reference
Administrative roles and privileges