We are using vmware Cisco ACS 5.2 in our company. And i'm confused about how does backuping works. We have maximum stored data period. As i understand, anything data out that period is purged. And we have icremental backups that works after complete backup. So restoring that incremental backups we can find only information from last maximum period or from any time? And how does purging works? Is it clear that if we use incremental backup, the data cleared every day?
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 quite a bit of time to complete. ACS 5.1 introduces the incremental backup option, which 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 onward. An incremental backup performs a full database backup the first time it is executed, 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.
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 114 GB (95% of the total database size of 120 GB), an alarm is sent to the dashboard.
•If the database disk usage is greater than 120 GB (100% of the total database size of 120 GB), a backup is run immediately followed by a purge until the database disk usage is below 120 GB. If the backup fails, check the database disk usage again.
–If the database disk usage is greater than 120 GB, but less than 150 GB (125% of the total database size of 120 GB), the Monitoring & Report Viewer decides to wait.
–If the backup fails and the database disk usage is greater than 150 GB, a purge occurs regardless of whether or not a backup has occurred until the database disk usage is below 120 GB.
For example, if you specify to preserve 5 months of data, but the database size is over 120 GB, a purge occurs. If the database size remains over 120 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 150 GB, a purge occurs regardless of whether or not a database backup has occurred. If the database size remains over 120 GB, additional purges occur until the database is 120 GB or less.
You can refer the following link for further refernece:
Thanks for your reply! I saw this materials at cisco.com, and these information is not so clear for me.
ACS restores data from all the backup files starting from the full backup and continuing until the latest incremental backup. So, for example, if i have maximum stored data period 1 month, i can see only backups from that period?
Lets go for another example. I've done next configuration:
Maximum stored data period : 1 month
Incremental data backup: daily
Full view database backup: 1 month
For example I've started it at 1st of January. And now is 10th of March. Is this correct that i can see in backup information about 1st of January, or only information from last month that was February?
It's quite difficult to explain. Is it clear that Maximum stored data period : 1 month means that all old month backups will be purged?
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