15-4
User Guide for Cisco Secure Access Control System 5.3
OL-24201-01
Chapter 15 Managing System Operations and Configuration in the Monitoring & Report Viewer
Configuring Data Purging and Incremental Backup
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If the database disk usage is greater than 83 GB, a backup is run immediately followed by a
purge until the database disk usage is below 83 GB.
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If the backup fails and the database disk usage is greater than 83 GB, the Monitoring & Report
Viewer decides to wait.
For example:
•If you specify that you want to preserve one month of data, and the database size is greater than
139 GB within a month, the purge deletes the data on a weekly basis until the database size
reaches 111 GB.
•If you specify that you want to preserve more than one month (for example, 5 months of data)
but the database size is over111 GB, a purge occurs. If the database size remains over 111 GB
after the purge, an additional month of data is purged, which results in 4 months of data
preserved. Before the purge, the database is backed up.
•If the database size is over 139 GB, a purge occurs regardless of whether or not a database backup
has occurred. If the database size remains over 111 GB, additional purges occur until the database
is 111 GB.
Note If the Incremental backup is configured as ON with no repository configured, database backup will fail
and Incremental backup mode will be changed to OFF.
Note When incremental backup is disabled, data is purged at the end of every month (Local time).
You can use the Data Purging and Incremental Backup page to:
•Configure purge window size
•Purge data from the database
•Assign a data repository backup location to manage backup (of the purge job)
•Configure incremental and full backup schedules
•Configure immediate backup.
The ACS Database needs to be compressed as a part of maintenance operation. You can run the
acsview-db-compress command from acs-config mode to reduce the physical size of the view database
when there is a difference between the physical size and actual size of the view database.
In ACS 5.3, database compress operation is automated. You can check the Enable ACS View Database
Compress check box to compress the ACS View database automatically every day at 5 A.M. The
database compress operation is run everyday automatically at 5 A.M whenever there is a need.
Note You need to enable the log recovery option to recover the log messages that may be received during the
database compress operation. If the log recovery feature is not enabled, then ACS sends an alert message
to enable the log recovery feature.
The following database limitations apply for ACS database compress:
•An automatic database compress operation is started the forthcomming day at 5 A.M as soon as the
database size is greater than 111 GB.