From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: Ceph performance on Ubuntu Oneiric vs Ubuntu Precise Date: Mon, 18 Jun 2012 13:17:47 -0500 Message-ID: <4FDF70CB.2000903@inktank.com> References: <4FDF6BB8.4080401@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-gh0-f174.google.com ([209.85.160.174]:63885 "EHLO mail-gh0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751166Ab2FRSRy (ORCPT ); Mon, 18 Jun 2012 14:17:54 -0400 Received: by ghrr11 with SMTP id r11so3931192ghr.19 for ; Mon, 18 Jun 2012 11:17:54 -0700 (PDT) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Tommi Virtanen Cc: "ceph-devel@vger.kernel.org" On 06/18/2012 01:12 PM, Tommi Virtanen wrote: > On Mon, Jun 18, 2012 at 10:56 AM, Mark Nelson wrote: >> I've been tracking down some performance issues over the past month with our >> internal test nodes and believe I have narrowed it down to something related >> to Ubuntu Oneiric. Tests done on nodes running Ubuntu Precise are >> significantly faster. > > Did you use Ubuntu kernels or our own builds? Different/same across runs? Each set of nodes is using our kernel from gitbuilder: http://gitbuilder.ceph.com/kernel-deb-oneiric-x86_64-basic/ref/v3.4/ and http://gitbuilder.ceph.com/kernel-deb-precise-x86_64-basic/ref/v3.4/ respectively. I should note that this problem was also seen on kernel 3.3 from gitbuilder with oneiric, though I do not have comparative numbers available. Mark