Hopefully this is just a quick and easy question. In preparing for a planned power down of our MDF I am making an extra backup of our CCM and Unity servers. I noticed that the regular weekly backups look to be running properly but for some reason the file size varies quite a lot over the past 7 or 8 backups. Anywhere from 970KB to 16,330KB. Does bars only make a backup of changes? The settings for what BARS is actually backing up does not change week to week. Currently the only check box filled is CCM. Also if I am backing up the Pub do I really need to back up the Sub if it is already sync'd up? Thank you in advance for any responses.
Here is another thing I just noticed the Sub backup is a consistent size and quite a bit larger then the Pub backup. Any ideas there?
You can identify the Sub as a backup target but its not a must unless you have different files in the TFTP folder that are not in the Pub database. The Backup Target designation is usually for CRA,CER Servers etc. My guess on the varying file size is that it is probably due to the amount of CDR's that are being backed up.
**For subscriber databases that are configured for backup, BARS backs up only TFTP files and CDR/CMR files.**
The following list shows the data that is backed up and restored for the Cisco CallManager publisher database:
Hosts and LMhosts files
Latest Cisco CallManager publisher database
DC Directory LDAP directory
For Cisco CallManager 3.3.x DirectoryConfiguration.ini from C:\dcdsrvr.
For Cisco CallManager 4.0(x) or later UMDirectoryConfiguration.ini.
Directory schema files avvid_schemaV*.txt
Publisher and subscriber configuration information to replication.ini file.
Cisco CallManager version to version.ini file.
If the option to backup CDR is chosen, CDR database and CDR/CMR flat files from Local CDR Path
TFTP files from C:\Program Files\Cisco\TFTPPath (the default path)
TFTP files from alternate file locations
Cisco Bulk Administration Tool (BAT) files-templates from C:\CiscoWebs\BAT, CSV files from C:\BAT and the BATversion.asp file.
HKLM\Software\Cisco Systems, Inc. (registry keys)
Cisco CallManager DSN
Security files (certificates) from under C:\Program Files\Cisco\Certificates. This applies only to Cisco CallManager 4.x or later.
The previous post is helpful and I will rate but I still wonder why the drastic change in size of my Publisher backup for week to week. There hasn't been that much of a fluctuation in the configuration of the system.
It's a little scary thinking that I will rely on these backups to restore a system when they change so much while the information they should be backing up doesn't change.
The size of the backup will vary due mainly to the volume of CDR records. You probably have the system set to purge the records at a specific time. This is why the backup size could be quite high one week (before purge) and quite low the following week (after purge). Just to reassure you, we recently did a rebuild in the lab using the BARS backup and it worked perfectly. Here is a great explanation of the backup file size from Gonzalo@Cisco;
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