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15-3
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
• Configuring Alarm Syslog Targets, page 15-17
• Configuring Remote Database Settings, page 15-17
Configuring Data Purging and Incremental Backup
The Monitoring & Report Viewer database handles large volumes of data. When the database size
becomes too large, it slows down all the processes. You do not need all the data all the time. Therefore,
to efficiently manage data and to make good use of the disk space, you must back up your data regularly
and purge unwanted data that uses up necessary disk space. Purging data deletes it from the database.
Since the Monitoring & Report Viewer database size is large, the backup process takes a long time to
complete. The incremental backup option enables you to take a complete backup of your Monitoring &
Report Viewer database once and then to back up data incrementally (that is, only the updates are backed
up and stored separately) from the next time onwards.
An incremental backup performs a full database backup the first time it is run, and subsequently only
backs up the updates that are made to the database. Incremental backups are therefore much faster and
make efficient use of disk space. You can also configure the frequency and time of incremental backups.
With incremental backups, multiple backup files are stored in the repository. However, when you restore
data from an incremental backup, ACS restores data from all the backup files starting from the full
backup and continuing until the latest incremental backup.
Note If you disable incremental backup for some reason, ensure that you run a full backup the next time before
you can continue with incremental backups again.
You can also configure a full database backup and define its frequency and time.
ACS also allows you to run an immediate backup of the full Monitoring & Report Viewer database.
However, you cannot concurrently run an incremental backup, full backup, and data purge. If any of
these jobs are running, you must wait for a period of 90 minutes before you can begin the next job.
Timesaver We recommend that you take a full backup the first time and then incrementally back up your data
instead of running full backups every time.
Note To ensure that your data is backed up before the purge, configure a data repository via the CLI or the
ACS web interface (System Administration > Operations > Software Repositories). Refer to the CLI
Reference Guide for the Cisco Secure Access Control System 5.3 for more information on configuring a
repository.
If you enable incremental backup, data is purged daily at 4:00 a.m. at the local time zone where the ACS
instance that runs the View process is located.
The following database limitations apply for purging:
• If the database disk usage is greater than 83 GB, an alarm is sent to the dashboard.
• If the database disk usage is greater than 111 GB and less than 139 GB, a backup is run immediately
followed by a purge until the database disk usage is below 111 GB. If the backup fails, check the
database disk usage again. The Monitoring & Report Viewer data is purged from the database. The
oldest data is purged first.