Forum Discussion
UCS files are a backup of the local appliance, and as such they contain data that have not been syncronized across a device group and data that are not part of the sync operation.
For example, you might have packet captures on one appliance, or ISO files, or maybe a user might have scripts saved in his home directory. None of this will be syncronized to the other appliance.
Text configuration files are in /config/ and /config/partitions/<p.name>/ folders , you can easily unzip them and check their sizes/content to confirm nothing's missing. (Of course, bigip_base.conf files are local-only)
If you have physical access to the appliance you can also run ls -al /config to find out what file sizes are.
I picked out two VMs to check and the files sizes were similar. I also checked their /var/tmp folders and didn't see a real difference there either. It's odd, but yes somewhere there are some files that aren't synced between the two. As the culprits all have APM licensed on them, I suspect the answer may lie with that.