> -----Original Message----- > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of > J David > Sent: 23 April 2015 20:19 > To: Nick Fisk > Cc: ceph-users@xxxxxxxxxxxxxx > Subject: Re: Having trouble getting good performance > > On Thu, Apr 23, 2015 at 3:05 PM, Nick Fisk <nick@xxxxxxxxxx> wrote: > > If you can let us know the avg queue depth that ZFS is generating that > > will probably give a good estimation of what you can expect from the > cluster. > > How would that be measured? Hopefully you should be able to see this by running iostat in the VM and looking at the device which contains the ZFS volume. > > > I have had a look through the fio runs, could you also try and run a > > couple of jobs with iodepth=64 instead of numjobs=64. I know they > > should do the same thing, but the numbers with the former are easier to > understand. > > That should be no problem; results should be available in a couple of hours. > > > It may also be worth getting hold of the RBD enabled fio so that you > > can test performance outside of the VM. > > Unless it comes in an apt-get-able package, that might be more of an issue. :) I think I managed the install the vivid version in Ubuntu trusty http://packages.ubuntu.com/vivid/fio > > Thanks! > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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