From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: Infiniband 40GB Date: Mon, 04 Jun 2012 07:40:08 -0500 Message-ID: <4FCCACA8.5000005@inktank.com> References: <4FCB1C0A.4050504@profihost.ag> <4FCB5EED.30909@inktank.com> <4FCC5431.6070002@suse.de> <4FCCA9EF.6080701@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-gh0-f174.google.com ([209.85.160.174]:43347 "EHLO mail-gh0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753367Ab2FDMkK (ORCPT ); Mon, 4 Jun 2012 08:40:10 -0400 Received: by ghrr11 with SMTP id r11so3245448ghr.19 for ; Mon, 04 Jun 2012 05:40:10 -0700 (PDT) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Tomasz Paszkowski Cc: Hannes Reinecke , Stefan Priebe , "ceph-devel@vger.kernel.org" On 6/4/12 7:34 AM, Tomasz Paszkowski wrote: > On Mon, Jun 4, 2012 at 2:28 PM, Mark Nelson wrote: >> >> For syncfs support, upgrade to a distro with glibc 2.13+ (ie precise). I've >> noticed a significant improvement in our spinning disk performance going >> from oneiric and kernel 3.3 to precise and kernel 3.4. I think part of this >> is related to the raid drivers for the cards we have in our test boxes >> though. I'm actually recording blktrace and seekwatcher results for all of >> our tests to specifically look at syncs and disk seek behavior... >> > > Correct me if I'am wrong. But AFAIR precise in running 3.2 kernel. Sorry, I should have been more clear. We were running oneiric with our own kernel 3.3 build and are now running precise with our own kernel 3.4 build (available on gitbuilder.ceph.com). Mark