From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: poor OSD performance using kernel 3.4 => problem found Date: Thu, 31 May 2012 14:33:08 +0200 Message-ID: <4FC76504.7040807@profihost.ag> References: <4FBE415E.8030702@profihost.ag> <4FC54CDB.1000506@inktank.com> <4FC5BF27.5060704@profihost.ag> <4FC5C941.6010105@profihost.ag> <4FC5FEC1.90103@profihost.ag> <4FC60FC8.207@inktank.com> <4FC61596.3050703@profihost.ag> <4FC62BB0.1020003@inktank.com> <4FC66A1F.1080407@profihost.ag> <4FC68CAA.9030708@profihost.ag> <4FC7197D.5010406@profihost.ag> <4FC76496.9020001@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:55907 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757565Ab2EaMdL (ORCPT ); Thu, 31 May 2012 08:33:11 -0400 In-Reply-To: <4FC76496.9020001@inktank.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Mark Nelson Cc: Stefan Majer , Yehuda Sadeh , ceph-devel@vger.kernel.org Am 31.05.2012 14:31, schrieb Mark Nelson: > Hi Stefan, > > Please do share! I was planning on starting out on the wiki and > eventually getting these kinds of things into the master docs. If you > (and others) have already done testing it would be really interesting to > compare experiences. So far I've been just kind of throwing stuff into: > > http://ceph.com/wiki/Performance_analysis > > In it's current form it's pretty inadequate, but I'm hoping to > eventually get back to it. A lot of the work I've been doing recently is > looking at underlying FS write behavior (specifically seeks) and if we > can get any reasonable improvement through mkfs and mount options. At least i'll start sharing when i've a fine running system ;-) I plan to switch to 10Gbe next week. Stefan