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https://issues.apache.org/jira/browse/CLOUDSTACK-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580720#comment-13580720
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Wido den Hollander commented on CLOUDSTACK-1301:
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Forgot this one: http://libvirt.org/formatdomain.html#iotune
So there is blkiotune and iotune, where we probably want iotune:
"Currently, the only tuning available is Block I/O throttling for qemu."
So that is handled in user-space which is better then kernel space where
cgroups live. cgroups also only work with regular block devices and files,
while iotune also works with RBD and such.
> VM I/O Throttling
> -----------------
>
> Key: CLOUDSTACK-1301
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-1301
> Project: CloudStack
> Issue Type: New Feature
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Affects Versions: 4.0.0
> Reporter: Wei Zhou
>
> VM I/O Throttling, to set the maximum disk I/O rate of VMs.
> Virtual machines are running on the same storage device (local storage or
> share strage). Because of the rate limitation of device (such as iops), if
> one VM has large disk operation, it may affect the disk performance of other
> VMs running on the same storage device.
> It is neccesary to set the maximum rate and limit the disk I/O of VMs.
> More details:
> https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+IO+Throttling
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