I just came across this problem too.
So just to get this right, if we want to backup twice eg once to local datacenter, once to remote datacenter, we lose all the goodness of incremental etc and are effectively doing full backups every time?
On my small cluster I also see a huge difference between PBS and NFS backup storage with Ceph.
This is a 25GB VM
To PBS - Over two and a half hours:
Same VM to NFS using a regular backup, no PBS - Just over three minutes:
Yes no problem, with me it was that I had just added the nodes to the cluster. This meant the storages were showing on each server. What I had to do was simply go into each storage and edit it to restrict the storage to its own server.
I hope this helps, I assumed everyone else knew this and...
When I try this I get:
zfs error: cannot open 'rpool': no such pool
2020-09-27 16:15:47 ERROR: Failed to sync data - could not activate storage 'ZFS', zfs error: cannot open 'rpool': no such pool
2020-09-27 16:15:47 aborting phase 1 - cleanup resources
2020-09-27 16:15:47 ERROR: migration...
My issue with the sql was actually related to me upgrading to wheezy from jessie to try and fix the issue. The my.cnf file was the problem so actually nothing to do with proxmox.
My other two issues where networking and a kernel panic relating to the scsi driver.
My networking issue was fixed...