Slower Snapshot-Mode Backups after moving from 3.0 to 4.1

Lonnie

Renowned Member
Sep 16, 2014
80
6
73
In Proxmox 3.0, my daily snapshot-mode-backup took 37 minutes to create a 78gig backup file.

After installing Proxmox 4.1, this same virtual machine now takes an hour and 40 minutes (1:40:00) to create the same 78gig backup file. When I backup the same virtual machine using stop-mode backup, it only takes 25 minutes.

However, in another cluster, at another site, (with same equipment), I have proxmox 4.1 doing snapshot-mode-backups of 87gigs in just 24:53 minutes.

I realize there are a lot of factors that effect the amount of time that a backup will take, but I want to emphasize that the vary day I moved from Proxmox 3 to Proxmox 4, is the day the backup-times increased dramatically -- all other factors seem to be the same: equipment, network, backup server, etc.

Please advise.
 
Last edited:
This attached file shows a backup log of when the snapshot-mode backups were fast in Proxmox 3.0.
 

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