Run the -c option once a week or whenever you back up the CCD.
This option makes a backup copy of the Dynamic CCD. The backup copy subsequently can be used to restore the Dynamic CCD by using the -r option. See "4.11.3 How to Restore the CCD" for more information.
When backing up the CCD, put all logical hosts in maintenance mode before running the ccdadm -c command. The logical hosts must be in maintenance mode when restoring the CCD database. Therefore, having a backup file similar to the restore state will prevent unnecessary errors or problems.
# ccdadm clustername -c checkpoint-filename |
In this command, checkpoint-filename is the name of your backup copy.