Hello. We have a primary and secondary DPM servers (DPM 2012 SP1). We protect a domain member file server via File protection. This works fine on the primary, synchronization occuring, recovery points being created etc.
However, on the secondary, the synchronization and recovery point creation jobs are frequently failing. I suspect this is because for some reason, it's not synchronizing only the changed data from the primary, but always the whole thing. We're speaking two disks with roughly 300 and 260GB of data respectively. Daily data change is usually 500MB-5GB as seen from the synchronization jobs on the primary DPM. However the jobs on secondary always copy hundreds of gigabytes of data every day, which is failing in the end, because there's a VPN connection between the primary and secondary DPM with limited bandwidth and it's not used exclusively for DPM, so there are badwidth restrictions set on the secondary DPM for the primary DPM agent.
Why is the secondary always moving those big chunks of data instead of the small changes that it's supposed to copy?
I've tried removing the protection group on primary and secondary for this file system, delete the backups and reconfigure the file protection from scratch, however after the initial synchronization, the above behavior comes back.
Thanks in advance