Re: [Xen-API] XCP 1.5 eta

[George Shuklin <george.shuklin@xxxxxxxxx>]

On 06.01.2012 18:54, Konrad Rzeszutek Wilk wrote:
> > We running cloud on XCP, I can say, that cpu performance is
> > negligible factor for current hypervisors state. The main problem
> > starts around network and disk performance, and balance of
> > features/speed of them.
> >
> > Our virtual machines boots within this time (10s and less) and I
> > can't say this is somehow critical question. More important is, f.e.
> > footprint on dom0 for network performance. I somehow unhappy of XCP
> > performance - I getting only 5-7GiB/s with about 100% load of one
> > dom0 vCPUs. I've prefer to see something around 8-9GiB/s with much
> Does it change if you make dom0 have more vCPUs?
At certain level, yes. But linear performance (per VM) will been kept in 
performance of single CPU...
> > lower load, but not sure if any other system with bridge level
> > aggregation and live migration could perform better.
> >
> > Same for disk IO - XCP do have relatively slow ISCSI, performing
> > only around 300-500MB/s (instead expected over 1GB/s), but, again, I
> > saw nothing better right now.
> 1GB being what you saw on baremetal? Or is that what your line speed is?
Baremetall shows something like 1.2-1.5GiB/s (bunch of disks in huge raid).
> > One problem with 'slow XCP' may be within HVM - which is lame mode
> > for lame windows-based appliances.
> Are you using the PV drivers in your HVM guest?
I don't use windows and don't use HVM at all. :)

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