[ceph-users] rbd bench-write vs dd performance confusion

2016-01-04 Thread Snyder, Emile
Hi all, I'm trying to get comfortable with managing and benchmarking ceph clusters, and I'm struggling to understan rbd bench-write results vs using dd against mounted rbd images. I have a 6 node test cluster running version 0.94.5, 2 nodes per rack, 20 OSDs per node. Write journals are on the

Re: [ceph-users] rbd bench-write vs dd performance confusion

2016-01-04 Thread Snyder, Emile
Ah, thanks, that makes sense. I see bug 14225 opened for the backport. I'm looking at http://tracker.ceph.com/projects/ceph-releases/wiki/HOWTO_backport_commits, I'll see if I can get a PR up for that. -emile On 1/4/16, 3:11 PM, "Jason Dillaman" wrote: >There was a bug in the rbd CLI bench-