[Fedora-xen] expected disk performance?

[Brian Stein]

Ben wrote:
> Well, I changed the io scheduling on the dom0 to use deadline and got a 
> 30% improvement. I then noticed that the domU was using the noop 
> scheduler, so for kicks I changed that to be deadline as well. Now I'm 
> going about 3 times faster than when I had been this morning. At 6MB/s 
> scap speed over 100Mb ethernet, that's not exactly where I want it, but 
> it's an awful lot better.
> 
> Thanks for this suggestion!

Glad that it helped.  We're very aware of the performance and have a few 
things in the works for network and general scheduling.  It definitely 
will continue to improve.

Brian

> On May 24, 2006, at 12:58 PM, Brian Stein wrote:
> 
>> Ben wrote:
>>> It's an adaptec card, and I've seen it push over 25MB/s before I went 
>>> to xen, so it's not the card.
>>
>> Try changing the I/O elevator to deadline for dom0 and report back on 
>> the thruput.  As there is planned tuning work this could change, but 
>> for now it may dramatically help.
>>