Slow restoration process Proxmox v6 vs v5

T

titouan

Renowned Member
Oct 5, 2015
12
1
68
Hi,

We recently upgraded a couple of our servers running Proxmox v5 to v6.
To do this we made a backup of every vm on the host, reinstalled the host in v6 and restored all the vms.

But what we noticed is that the restoration took much longer than expected.
After this we decided to compare the restoration time between v5 and v6 on the same host with the same configuration and the same backup.

The time difference is significant :
  • Proxmox v5 : ~40min
  • Proxmox v6 : ~1h
This is for a 30G backup and since we have VMs that are quite large this difference really increases exponentially.
We are using local storage with SSDs with an hardware RAID 1, no LVM Thin and qcow2 images.

Has anyone noticed this as well ? Do you have any idea how to improve the restoration speeds on v6 ?
 
Another thing that we noticed is that during a restoration the server is barely usable on the v6 even when applying a rate limit, whereas on v5 the other VMs are still in a functioning state. I'm wondering how much of it is related the timing issue ?
 
Hi,

Am I the only one who had this issue ?

This is really problematic for us and we cannot continue our migration to Proxmox 6 until this is fixed.
I would really appreciate any help :)

Thanks!
 
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