David, Could you try rados -p data bench 60 write -t 16 -b 4096? rados bench defaults to 4MB objects, this'll give us results for 4k objects. If you could give me the latency too, that would help. -Sam On Thu, Jul 5, 2012 at 12:49 PM, Mark Nelson <mark.nelson@xxxxxxxxxxx> wrote: > On 07/05/2012 01:43 PM, David Blundell wrote: >>> >>> Hi David and Alexandre, >>> >>> Does this only happen with random writes or also sequential writes? If >>> it >>> happens with sequential writes as well, does it happen with rados bench? >>> >>> -- >>> Mark Nelson >>> Performance Engineer >>> Inktank >> >> >> Hi Mark, >> >> I just ran "rados -p data bench 60 write -t 16" and a few dd tests with no >> problems at all so at the moment it looks like only random IO triggers the >> slow writes. >> >> Please do let me know if there are any other tests that I can do to help >> track down the cause. >> >> David > > > Thanks David! We've got some people internally taking a look at this. I'll > let you guys know if there is anything else we need! > > Thanks, > Mark > > > -- > Mark Nelson > Performance Engineer > Inktank > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
