[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

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

2016-01-04 Thread Snyder, Emile
>> From: "Emile Snyder" <emsny...@ebay.com> >> To: ceph-users@lists.ceph.com >> Sent: Monday, January 4, 2016 3:51:25 PM >> Subject: [ceph-users] rbd bench-write vs dd performance confusion >> >> Hi all, >> >> I'm trying to get comfortable

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

2016-01-04 Thread Jason Dillaman
t; > To: ceph-users@lists.ceph.com > Sent: Monday, January 4, 2016 3:51:25 PM > Subject: [ceph-users] rbd bench-write vs dd performance confusion > > Hi all, > > I'm trying to get comfortable with managing and benchmarking ceph clusters, > and I'm struggling to understan rbd bench-writ