Jianfeng and Hu Tao,
Just want to draw your attention to this thread if you haven't seen it
:). Your review and thoughts on I/O throttling in libvirt would be
appreciated.
Stefan
On Mon, Oct 10, 2011 at 2:45 PM, Lei Li wrote:
> Today libvirt supports the cgroups blkio-controller, which handles
> proportional shares and throughput/iops limits on host block devices.
> blkio-controller does not support network file systems (NFS) or other
> QEMU remote block drivers (curl, Ceph/rbd, sheepdog) since they are
> not host block devices. QEMU I/O throttling works with all types of
> drive and can be applied independently to each drive attached to
> a guest and supports throughput/iops limits.
>
> To help add QEMU I/O throttling support to libvirt, we plan to complete
> it with add new API virDomainBlockIoThrottle(), new command 'blkiothrottle'
> and Python bindings.
>
> Notes: we are sending this series out now(even though they are not completed
> yet.)because we want to start the review process. These patches implemented
> the below features by Zhi Yong Wu:
>
> 1) Enable the blkio throttling in xml when guest is starting up.
>
> Add blkio throttling in xml as follows:
>
>
>
>
>
> function='0x0'/>
>
>
>
> 2) Enable blkio throttling setting at guest running time.
>
> virsh blkiothrottle [--bps] [--bps_rd]
> \
> [--bps_wr] [--iops] [--iops_rd] [--iops_wr]
>
> [PATCH 1/5] Add new API virDomainBlockIoThrottle.
> [PATCH 2/5] Add virDomainBlockIoThrottle support to the remote driver.
> [PATCH 3/5] Implement virDomainBlockIoThrottle for the qemu driver.
> [PATCH 4/5] Enable the virDomainBlockIoThrottle API in virsh.
> [PATCH 5/5] Enable virDomainBlockIoThrottle in the python API.
>
> And I will address feedback and work on the missing features in few days
> includes:
>
> 3) The support to display the setting for block i/o throttling - HMP/QMP
> 4) Python binding support.
> 5) --current --live --config options support to unify the libvirt API.
>
>
>
> --
> Lei
>
>
> --
> libvir-list mailing list
> libvir-list@redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
>
--
libvir-list mailing list
libvir-list@redhat.com
https://www.redhat.com/mailman/listinfo/libvir-list
