Limiting impact of qmrestore

E

ejmerkel

Renowned Member
Proxmox Subscriber
Sep 20, 2012
121
4
83
I've done some large restores and while that process is going on VM's IO slows down dramatically causing issues.

What is the best way to limit the impact of a qmrestore on the filesystem it is restoring to? Just use ionice or is there a way to limit the speed of the restore?

Best regards,
Eric
 
I have noticed this as well with 4.2, can't say I really did any big restores on 3.x.

Several large restores on 4.2 cause the whole host and every VM on it to become extremely slow and even not responsive at all.

The host isn't a powerhouse but its still a dual quad opteron with 64G of RAM and 2 x RAID 5 arrays on dell PERC 6i controllers.
 
tomstephens89 said:
I have noticed this as well with 4.2, can't say I really did any big restores on 3.x.

Several large restores on 4.2 cause the whole host and every VM on it to become extremely slow and even not responsive at all.

The host isn't a powerhouse but its still a dual quad opteron with 64G of RAM and 2 x RAID 5 arrays on dell PERC 6i controllers.
Click to expand...

Yep, I'm talking about 4.2, but this effects also 3.4 on a different hosts. Both are 2x Xeon CPU E5-2640 with 64GB RAM.
But I think this is more about storage performance (if you have BBU enabled, of course). I have RAID10 from 15k SAS HDDs, I can't say this is bad storage.
Proxmox has I/O shaping for backups, I believe same must be the same about restores, or maybe something about AIO.
 
You must log in or register to reply here.
Top Bottom