Re: [Qemu-devel] [PATCH v9 0/4] The intro of QEMU block I/O throttling

[Zhi Yong Wu]

On Sun, Oct 30, 2011 at 6:44 PM, Richard Davies
<address@hidden> wrote:
> Hi,
>
> I've been following the evolution of this patch with great interest for use
> in our qemu-kvm based IaaS public cloud.
>
> I am not a qemu developer, but have watched this patch go through many
> rounds of review and we are very much hoping that it makes it into QEMU 1.0.
Yeah, we also hope that it can be merged into QEMU 1.0.
By the way, the issue below has been resolved.
1.) When bps/iops limits are specified to a small value such as 511
bytes/s, this VM will hang up. We are considering how to handle this
senario.

Any comment is appreciated if you have other concerns.

>
> In a multi-customer multi-VM public cloud environment, disk i/o limiting is
> absolutely key, and qemu itself is a much better place to do it than with a
> mix of cgroups and other technologies for each different storage backend.
> I understand that it is also more efficient:
>
>  
> http://www.linux-kvm.org/wiki/images/7/72/2011-forum-keep-a-limit-on-it-io-throttling-in-qemu.pdf
>
> As I say, I am not a qemu developer, so cannot practically help, but wanted
> to post to emphasize the importance of this technology as a consumer of qemu.
No matter...

>
> Best regards,
>
> Richard.
>
>



-- 
Regards,

Zhi Yong Wu