Dor Laor wrote:
On 11/14/2009 04:23 PM, Gordan Bobic wrote:
I just tried paravirtualized virtio block devices, and my tests show
that they are approximately 30% slower than emulated IDE devices. I'm
guessing this isn't normal. Is this a known issue or am I likely to have
mosconfigured something? I'm using 64-bit RHEL/CentOS 5 (both host and
guest).
Please try to change the io scheduler on the host to io scheduler, it
should boost your performance back.
I presume you mean the deadline io scheduler. I tried that (kernel
parameter elevator=deadline) and it made no measurable difference
compared to the cfq scheduler.
Gordan
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