From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Why is librbd1 / librados2 from Firefly 20% slower than the one from dumpling? Date: Fri, 13 Jun 2014 16:59:16 +0200 Message-ID: <539B11C4.1010400@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ceph-users-bounces-idqoXFIVOFJgJs9I8MT0rw@public.gmane.org Sender: "ceph-users" To: "ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , ceph-users List-Id: ceph-devel.vger.kernel.org Hi, while testint firefly i cam into the sitation where i had a client where the latest dumpling packages where installed (0.67.9). As my pool has hashppool false and the tunables are set to default it can talk to my firefly ceph sotrage. For random 4k writes using fio with librbd and 32 jobs and an iodepth of 32. I get these results: librbd / librados2 from dumpling: write: io=3020.9MB, bw=103083KB/s, iops=25770, runt= 30008msec WRITE: io=3020.9MB, aggrb=103082KB/s, minb=103082KB/s, maxb=103082KB/s, mint=30008msec, maxt=30008msec librbd / librados2 from firefly: write: io=7344.3MB, bw=83537KB/s, iops=20884, runt= 90026msec WRITE: io=7344.3MB, aggrb=83537KB/s, minb=83537KB/s, maxb=83537KB/s, mint=90026msec, maxt=90026msec Stefan