Re: [PATCH v2 0/3] Improve virtio-blk performance
From: Stefan Hajnoczi <hidden>
Date: 2012-06-18 10:58:57
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kvm, lkml
On Mon, Jun 18, 2012 at 10:39 AM, Asias He [off-list ref] wrote:
On 06/18/2012 05:14 PM, Stefan Hajnoczi wrote:quoted
On Mon, Jun 18, 2012 at 7:53 AM, Asias He [off-list ref] wrote:quoted
Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16% latency improvement for sequential read/write, random read/write respectively.Sounds great. What storage configuration did you use (single spinning disk, SSD, storage array) and are these numbers for parallel I/O or sequential I/O?I used ramdisk as the backend storage.
As long as the latency is decreasing that's good. But It's worth keeping in mind that these percentages are probably wildly different on real storage devices and/or qemu-kvm. What we don't know here is whether this bottleneck matters in real environments - results with real storage and with qemu-kvm would be interesting. Stefan