[Proxmox] Backup VM

[jsenzier]

Hello,

I try to backup a virtual machine (Linux - 100 Go, but only 50Go is used) on snapshot mode.

In the log file, I can read :

INFO: starting new backup job: vzdump 101 --compress lzo --storage SAUVEGARDE
INFO: Starting Backup of VM 101 (openvz)
INFO: CTID 101 exist mounted running
INFO: status = running
INFO: mode failure - unable to dump into snapshot (use option --dumpdir)
INFO: trying 'suspend' mode instead
INFO: backup mode: suspend
INFO: ionice priority: 7

The backup was launched at 00:00 today, and it's not terminated yet.

14 hours to backup 50Go, it's crazy.

I have another virtual machine which have 2,5 To to backup, i think it will be impossible ...

Any idea ?

 

[dietmar]

Please choose another backup target. You simply cannot store the copy of an LVM snapshot inside the same
LVM snapshot (that is an endless loop).

 

[jsenzier]

Can I have more precisions about this ?

My target is SAUVEGARDE which is the /var/lib/vz/dump directory.

 

[jsenzier]

How the copy of my VM can enter in an endless loop ? I don't understand why.

I launched the copy of my "biggest" VM (20% of the 2,5To used) yesterday at 17:00, and it's still in progress. Any idea ?

 

[m.ardito]

How the copy of my VM can enter in an endless loop ? I don't understand why.

I launched the copy of my "biggest" VM (20% of the 2,5To used) yesterday at 17:00, and it's still in progress. Any idea ?

Hi, I dont know what is the loop dietmar was referring to, but, usually reasons for such slow behaviour could be mainly in the speed and type of the storage and/or the network used (if is a storage network): use pveperf for that storage, and post pveversion -v output and storage.conf relevant sections.

Storage disk performances, could impact speeds, and also, using the same network for vm disks and traffic and backups could slow things down, of course.

I'm not an expert, but more details are needed to have the chances to understand the problem, for anyone.

Marco