Hi,
I have a strange issue with the Proxmox Backup function. I have 4 Clusters (2+1) running with DRBD as storage backend.
On a other location (in a data center) runs a Proxmox Backup server. Both locations are connected via 1GBit/s.
Now I want to backup all of my VMs to the PBS over the 1GBit internet link. I know the initial run will last several hours, maybe days. The backup mode on the PVEs is set to snapshot and i have one job per Cluster (seems to run 2 jobs in parallel).
When the Backup runs, after a few hours i got I/O errors on the VMs where the backup is running. It seems the blockdevice stalls for a longer time (over 600 seconds). Then the vm kernel remounts the filesystems ro.
This leads me to my first question:
Is a longer runtime a Problem when using Snapshot mode?
For better understanding whats going on, I want to see where the snapshots are created when backup is runnning.
When i perform a snapshot in proxmox ui i can see that drbd is creating a snapshot and after succsefull creation i can see the snapshot in the linstor controller. But when proxmox backup is running i can not see anything about snapshots in drbd or linstor.
This brings me to my second question:
Does proxmox backup in snapshot mode really create snapshots? Or does it skip the task and just copy the mounted drbd volume? Maybe there is some hidden proxmox magic going on I don't know about?
I have a strange issue with the Proxmox Backup function. I have 4 Clusters (2+1) running with DRBD as storage backend.
On a other location (in a data center) runs a Proxmox Backup server. Both locations are connected via 1GBit/s.
Now I want to backup all of my VMs to the PBS over the 1GBit internet link. I know the initial run will last several hours, maybe days. The backup mode on the PVEs is set to snapshot and i have one job per Cluster (seems to run 2 jobs in parallel).
When the Backup runs, after a few hours i got I/O errors on the VMs where the backup is running. It seems the blockdevice stalls for a longer time (over 600 seconds). Then the vm kernel remounts the filesystems ro.
This leads me to my first question:
Is a longer runtime a Problem when using Snapshot mode?
For better understanding whats going on, I want to see where the snapshots are created when backup is runnning.
When i perform a snapshot in proxmox ui i can see that drbd is creating a snapshot and after succsefull creation i can see the snapshot in the linstor controller. But when proxmox backup is running i can not see anything about snapshots in drbd or linstor.
This brings me to my second question:
Does proxmox backup in snapshot mode really create snapshots? Or does it skip the task and just copy the mounted drbd volume? Maybe there is some hidden proxmox magic going on I don't know about?
