From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jim Schutt" Subject: Re: Interesting results Date: Mon, 2 Jul 2012 08:04:48 -0600 Message-ID: <4FF1AA80.4070009@sandia.gov> References: <4FECDCB0.7080406@sandia.gov> <4FF0AB99.4060103@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from sentry-two.sandia.gov ([132.175.109.14]:35841 "EHLO sentry-two.sandia.gov" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750838Ab2GBOFI (ORCPT ); Mon, 2 Jul 2012 10:05:08 -0400 In-Reply-To: <4FF0AB99.4060103@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe Cc: "ceph-devel@vger.kernel.org" On 07/01/2012 01:57 PM, Stefan Priebe wrote: > thanks for sharing. Which btrfs mount options did you use? -o noatime is all I use. -- Jim > > Am 29.06.2012 00:37, schrieb Jim Schutt: >> Hi, >> >> Lots of trouble reports go by on the list - I thought >> it would be useful to report a success. >> >> Using a patch (https://lkml.org/lkml/2012/6/28/446) >> on top of 2.5-rc4 for my OSD servers, the same kernel >> for my Linux clients, and a recent master branch >> tip (git://github.com/ceph/ceph commit 4142ac44b3f), >> I was able to sustain streaming writes from 166 linux >> clients for 2 hours: >> >> On 166 clients: >> dd conv=fdatasync if=/dev/zero >> of=/mnt/ceph/stripe-4M/1/zero0.`hostname -s` bs=4k count=65536k >> >> Elapsed time: 7274.55 seconds >> Total data: 45629732.553 MB (43515904 MiB) >> Aggregate rate: 6272.516 MB/s >> >> That kernel patch was critical; without it this test >> runs into trouble after a few minutes because the >> kernel runs into trouble looking for pages to merge >> during page compaction. Also critical were the ceph >> tunings I mentioned here: >> http://www.spinics.net/lists/ceph-devel/msg07128.html >> >> -- Jim >> >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > >