[pve-devel] adding live migration options ? (xbzlre, compression, ...)

Dietmar Maurer dietmar at proxmox.com
Thu Sep 24 11:45:08 CEST 2015


> >>I think those are special cases, and it is always better to enable
> >>compression, 
> >>because 
> >>it reduces traffic on the network.
> 
> the kvm forum slides, they said that with compression, the migration is slower
> 
> on 10gbit network.

Don't get me wrong, but this depends on many, many factors. I am sure this is
true
if you run a single migration. But the picture is totally different if you run
on a real network which is used by many other VMs. Or if you run more than one
migration
at same time.

> >>But do we already use lz4? 
> Currently we don't have implemented live migration compress. (it's a new
> feature from qemu 2.4)
> 
> 
> I'll make a basic patch to enable compression, and will do some benchmark with
> 10gbe network.

Great.



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