[pve-devel] KVM Live Backup performance

Michael Rasmussen mir at datanom.net
Sat Nov 23 14:28:55 CET 2013


On Sat, 23 Nov 2013 07:16:28 +0000
Dietmar Maurer <dietmar at proxmox.com> wrote:

> > I agree, limiting IO from the VM during backup can have advantages.
> > On the flip side loosing 50% of the IO
> 
> This 50% loose has nothing to do with the new backup algorithm, because
> your test does not involve any writes. So it is more likely a bug in the
> AIO code. I will dig deeper next week.
> 
> I wonder if such slowdown also happen with other KVM block jobs (storage migrate).
> 
I might just do because I seem to remember online migration failing
with timeout errors as reason.

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