Re: [Fedora-xen] expected disk performance?

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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.



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