From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Newstore Update Part 2 Date: Fri, 08 May 2015 18:21:07 -0500 Message-ID: <554D44E3.7080600@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:35341 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751307AbbEHXVK (ORCPT ); Fri, 8 May 2015 19:21:10 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id EA92635C80C for ; Fri, 8 May 2015 23:21:09 +0000 (UTC) Received: from [10.3.112.73] (ovpn-112-73.phx2.redhat.com [10.3.112.73]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t48NL7pD005318 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 8 May 2015 19:21:09 -0400 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel Hi Guys, At the performance meeting this week we discussed the possibility of changing how newstore handles large partial overwrites. To determine if this is useful, we look at rados bench and rbd performance of newstore at various IO sizes. I've also included some rados bench read results as folks were interested in those. On the graphs I've tried to mark interesting improvements/regressions and also some questions/comments. These tests were run without overlay which may help small IO performance in some cases. Graphs are here: http://nhm.ceph.com/newstore/8c8c5903_rbd_rados_tests.pdf Thanks, Mark