[PVE-User] backup takes so long to finish

Bart Lageweg | Bizway bart at bizway.nl
Wed Aug 27 18:57:57 CEST 2014

I/O in VM when you backup (SQL tasks etc) is slowing down backup.

Van: Gilberto Nunes [mailto:gilberto.nunes32 at gmail.com]
Verzonden: woensdag 27 augustus 2014 18:55
Aan: Bart Lageweg | Bizway
CC: pve-user at pve.proxmox.com
Onderwerp: Re: [PVE-User] backup takes so long to finish

Hum... At first moment, I thought I/O could being a trouble, since I was ran backup in USB devices.
But now, I ran backup task on SAS disk! So performance and I/O is not an issue here...
And, I can't shrink the file, because the entire disk is being used to all databases as I described before...

If somebody else has any other advice, I will appreciate...
Thank you

2014-08-27 13:47 GMT-03:00 Bart Lageweg | Bizway <bart at bizway.nl<mailto:bart at bizway.nl>>:
High I/O when you backup ?

Try https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files (when you have a good backup!)

Van: pve-user [mailto:pve-user-bounces at pve.proxmox.com<mailto:pve-user-bounces at pve.proxmox.com>] Namens Gilberto Nunes
Verzonden: woensdag 27 augustus 2014 18:47
Aan: pve-user at pve.proxmox.com<mailto:pve-user at pve.proxmox.com>
Onderwerp: [PVE-User] backup takes so long to finish

I have a VM with Windows 2012 running nicely in PVE 3.2.
This VM has a 300 GB disk size that was re-partition with 5 or 6 different parts, in order to allocate different databases...
The issue is that the backup task takes 6 hours to generate a lzo file with 13 GB size!
However, I have another VM, which is Windows 2008 with disk 120 GB size.
The backup makes 74 GB file of size, and takes approximately 30 minutes!!!
I can't see why the first task took so long time to finish!!!
Can anybody assist me??

Gilberto Ferreira

Gilberto Ferreira

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