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https://issues.apache.org/jira/browse/CLOUDSTACK-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641854#comment-13641854
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Wei Zhou commented on CLOUDSTACK-1301:
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David,
It works on libvirt 0.9.8 (or later) and QEMU 1.1.0(or later)
For Ubuntu 12.04 (with qemu 1.0.0) or CentOS 6.3/6.4 (with qemu 0.12.1.2) ,
qemu need to be upgraded to at least 1.1.0 (1.2.0 is better).
> VM Disk 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, 4.1.0
> Reporter: Wei Zhou
> Assignee: Wei Zhou
> Fix For: 4.2.0
>
>
> VM Disk 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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