From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: ceph-osd cpu usage Date: Fri, 16 Nov 2012 10:11:36 +0100 Message-ID: <50A60348.5080604@profihost.ag> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:51653 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751217Ab2KPJLq (ORCPT ); Fri, 16 Nov 2012 04:11:46 -0500 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Alexandre DERUMIER Cc: ceph-devel@vger.kernel.org, Sage Weil Am 16.11.2012 09:41, schrieb Alexandre DERUMIER: >>> Any other ideas how to reduce ceph-osd while doing randwrite? >>> >>> Randread gives me with 3 VMs: 60.000 iops >>> Randwrite gives me with 3 VMs: 25.000 iops > > Great to see that read scale ! Yes that works fine. > For randwrite, what is the bottleneck now with filestore xattr use omap = true ? Oh no the result was still with default fsetxattr. Filestore xattr use omap added another 20% load an resultet in much lower iops. Seems i wasn't clear enough about that. Stefan