On Wed, Jun 01, 2011 at 09:32:32AM -0400, Vivek Goyal wrote: >Date: Wed, 1 Jun 2011 09:32:32 -0400 >From: Vivek Goyal <vgoyal@xxxxxxxxxx> >To: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> >Cc: kwolf@xxxxxxxxxx, stefanha@xxxxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, > guijianfeng@xxxxxxxxxxxxxx, qemu-devel@xxxxxxxxxx, wuzhy@xxxxxxxxxx, > herbert@xxxxxxxxxxxxxxxxxxxx, ejt@xxxxxxxxxx, luowenj@xxxxxxxxxx, > zhanx@xxxxxxxxxx, zhaoyang@xxxxxxxxxx, llim@xxxxxxxxxx, > raharper@xxxxxxxxxx >Subject: Re: [Qemu-devel] [RFC]QEMU disk I/O limits >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 <vgoyal@xxxxxxxxxx> >> >To: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> >> >Cc: kwolf@xxxxxxxxxx, aliguori@xxxxxxxxxx, stefanha@xxxxxxxxxxxxxxxxxx, >> > kvm@xxxxxxxxxxxxxxx, guijianfeng@xxxxxxxxxxxxxx, >> > qemu-devel@xxxxxxxxxx, wuzhy@xxxxxxxxxx, >> > herbert@xxxxxxxxxxxxxxxxxxxx, luowenj@xxxxxxxxxx, zhanx@xxxxxxxxxx, >> > zhaoyang@xxxxxxxxxx, llim@xxxxxxxxxx, raharper@xxxxxxxxxx >> >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? Right. They both will together limit runtime I/O rate. Regards, Zhiyong Wu > >Thanks >Vivek -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
