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<DIV>On 2013-08-28 09:35 , <A href="mailto:eblake@redhat.com">Eric
Blake</A> wrote:</DIV>
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<DIV>On 08/26/2013 10:10 PM, hzguanqiang@corp.netease.com wrote:</DIV>
<DIV>> Hello experts,</DIV>
<DIV> </DIV>
<DIV>[please configure your mailer to wrap long lines]</DIV>
<DIV> </DIV>
<DIV>> </DIV>
<DIV>> It seems that blkiotune of kvm domain is set through qemu now,
and We found there are some throttle shaking problem when using this
interface.</DIV>
<DIV>> </DIV>
<DIV>> As you can do the same thing through blkio cgroup, and this
sounds to show better performance, Can we realize domainSetBlockIoTune
by cgroup just like interface domainSetBlkioParameters ? Or Add a new
interface to support setting disk IOtune by blkio cgroup?</DIV>
<DIV> </DIV>
<DIV>Current libvirt already lets you choose between cgroup blkio vs.
qemu io</DIV>
<DIV>throttling. Compare:</DIV>
<DIV> </DIV>
<DIV>http://libvirt.org/formatdomain.html#elementsBlockTuning
describes</DIV>
<DIV><blkiotune> (implemented via cgroups, on a
per-host-block-device basis);</DIV>
<DIV>mapped through the virDomainSetBlkioParameters API, or via 'virsh
blkiotune'</DIV>
<DIV> </DIV>
<DIV>http://libvirt.org/formatdomain.html#elementsDisks describes
<iotune></DIV>
<DIV>under <disk> (implemented via qemu, on a per-guest-disk
basis); mapped</DIV>
<DIV>through the virDomainSetBlockIoTune API, or via 'virsh
blkdeviotune'</DIV>
<DIV> </DIV>
<DIV>(and yes, we're lousy at using consistently named API)</DIV>
<DIV> </DIV>
<DIV>-- </DIV>
<DIV>Eric Blake eblake redhat com
+1-919-301-3266</DIV>
<DIV>Libvirt virtualization library <A
href="http://libvirt.org">http://libvirt.org</A></DIV>
<DIV> </DIV>
<DIV> </DIV></BLOCKQUOTE></TD></TR></TBODY></TABLE></DIV>
<DIV> </DIV>
<DIV>Well , Eric, Thanks for your answer. The
virDomainSetBlkioParameters API you said is just to</DIV>
<DIV>set the blkio.device_weight, not throttle.iops or throttle.bps just as the
virDomainSetBlockIoTune</DIV>
<DIV> API did.</DIV>
<DIV> </DIV>
<DIV>Thanks</DIV>
<DIV><SPAN>
<DIV style="FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<DIV>------------------ <BR>Best
regards!<BR>GuanQiang</DIV></DIV></SPAN></DIV>
<DIV>09:40:56</DIV></BODY></HTML>