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Re: [Qemu-devel] [RFC]QEMU disk I/O limits


From: Vivek Goyal
Subject: Re: [Qemu-devel] [RFC]QEMU disk I/O limits
Date: Wed, 1 Jun 2011 09:32:32 -0400
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Jun 01, 2011 at 11:19:58AM +0800, Zhi Yong Wu wrote:
> On Tue, May 31, 2011 at 03:55:49PM -0400, Vivek Goyal wrote:
> >Date: Tue, 31 May 2011 15:55:49 -0400
> >From: Vivek Goyal <address@hidden>
> >To: Zhi Yong Wu <address@hidden>
> >Cc: address@hidden, address@hidden, address@hidden,
> >     address@hidden, address@hidden,
> >     address@hidden, address@hidden,
> >     address@hidden, address@hidden, address@hidden,
> >     address@hidden, address@hidden, address@hidden
> >Subject: Re: [Qemu-devel] [RFC]QEMU disk I/O limits
> >User-Agent: Mutt/1.5.21 (2010-09-15)
> >
> >On Mon, May 30, 2011 at 01:09:23PM +0800, Zhi Yong Wu wrote:
> >
> >[..]
> >>     3.) How the users enable and play with it
> >>     QEMU -drive option will be extended so that disk I/O limits can be 
> >> specified on its command line, such as -drive [iops=xxx,][throughput=xxx] 
> >> or -drive [iops_rd=xxx,][iops_wr=xxx,][throughput=xxx] etc. When this 
> >> argument is specified, it means that "disk I/O limits" feature is enabled 
> >> for this drive disk.
> >
> >How does throughput interface look like? is it bytes per second or something
> >else?
> Given your suggestion, its form will look like below:
> 
> -drive [iops=xxx][,bps=xxx] or -drive 
> [iops_rd=xxx][,iops_wr=xxx][,bps_rd=xxx][,bps_wr=xxx]

Can one specify both iops and bps rule for the same drive?

Thanks
Vivek



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