Hi Vivek, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > On Tue, Sep 01, 2009 at 01:47:24PM -0400, Vivek Goyal wrote: > > On Tue, Sep 01, 2009 at 12:50:11PM -0400, Vivek Goyal wrote: > > > Hi Ryo, > > > > > > I decided to play a bit more with dm-ioband and started doing some > > > testing. I am doing a simple two dd threads doing reads and don't seem > > > to be gettting the fairness. So thought will ask you what's the issue > > > here. Is there an issue with my testing procedure. > > > > > > I got one 40G SATA drive (no hardware queuing). I have created two > > > partitions on that disk /dev/sdd1 and /dev/sdd2 and created two ioband > > > devices ioband1 and ioband2 on partitions sdd1 and sdd2 respectively. The > > > weights of ioband1 and ioband2 devices are 200 and 100 respectively. > > > > > > I am assuming that this setup will create two default groups and IO > > > going to partition sdd1 should get double the BW of partition sdd2. > > > > > > But it looks like I am not gettting that behavior. Following is the output > > > of "dmsetup table" command. This snapshot has been taken every 2 seconds > > > while IO was going on. Column 9 seems to be containing how many sectors > > > of IO has been done on a particular io band device and group. Looking at > > > the snapshot, it does not look like that ioband1 default group got double > > > the BW of ioband2 default group. > > > > > > Am I doing something wrong here? > > > > > > > Hi Ryo, > > Did you get a chance to look into it? Am I doing something wrong or it is > an issue with dm-ioband. Sorry, I missed it. I'll look into it and report back to you. Thanks, Ryo Tsuruta -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
