Is there a way to give priority access to the disks in the same way that the sched-credit system gives priority access to CPU? Basically, disk is my bottleneck and some of my domUs are of an obviously lower priority than others. I''d like to say that domU A gets to use the disk only half as often as domU B and so forth. Thanks! -Dylan _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mon, Nov 3, 2008 at 6:14 PM, Dylan Martin <dmartin@sccd.ctc.edu> wrote:> Is there a way to give priority access to the disks in the same way > that the sched-credit system gives priority access to CPU? > > Basically, disk is my bottleneck and some of my domUs are of an > obviously lower priority than others. I''d like to say that domU A > gets to use the disk only half as often as domU B and so forth. >I don''t have personal experience with it, but maybe dm-ioband is something that you might want to look into. See: http://people.valinux.co.jp/~ryov/dm-ioband/manual/examples.html In particular, Example #5: Bandwidth control for Xen blktap devices If you try this out, please report back to the list. Can others comment on experiences with dm-ioband? Cheers, Todd -- Todd Deshane http://todddeshane.net http://runningxen.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Interesting! I could just as easily use ionice/CFQ with blktap. I should look into that. dm-ioband looks good for more complex requirements than mine, but the blktap example is very helpful. Thanks! On Mon, Nov 3, 2008 at 4:56 PM, Todd Deshane <deshantm@gmail.com> wrote:> On Mon, Nov 3, 2008 at 6:14 PM, Dylan Martin <dmartin@sccd.ctc.edu> wrote: >> Is there a way to give priority access to the disks in the same way >> that the sched-credit system gives priority access to CPU? >> >> Basically, disk is my bottleneck and some of my domUs are of an >> obviously lower priority than others. I''d like to say that domU A >> gets to use the disk only half as often as domU B and so forth. >> > > I don''t have personal experience with it, but maybe dm-ioband is > something that you might want to look into. See: > http://people.valinux.co.jp/~ryov/dm-ioband/manual/examples.html > > In particular, > Example #5: Bandwidth control for Xen blktap devices > > If you try this out, please report back to the list. > > Can others comment on experiences with dm-ioband? > > Cheers, > Todd > > -- > Todd Deshane > http://todddeshane.net > http://runningxen.com >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users