From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yann Dupont Subject: Re: poor OSD performance using kernel 3.4 Date: Tue, 29 May 2012 23:45:17 +0200 Message-ID: <4FC5436D.3090606@univ-nantes.fr> References: <5970d59f-9531-4f60-8600-3e1268824c83@mailpro> <4FC49B12.8020004@profihost.ag> <4FC4D1A8.1080001@univ-nantes.fr> <4FC4E0A9.8010008@profihost.ag> <4FC50C4A.4090101@inktank.com> <4FC53AC4.5020600@profihost.ag> <4FC54020.8040603@univ-nantes.fr> <4FC540DA.2050601@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtptls1-cha.cpub.univ-nantes.fr ([193.52.103.113]:43328 "EHLO smtp-tls.univ-nantes.fr" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751557Ab2E2VpW (ORCPT ); Tue, 29 May 2012 17:45:22 -0400 In-Reply-To: <4FC540DA.2050601@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe Cc: Mark Nelson , ceph-devel@vger.kernel.org Le 29/05/2012 23:34, Stefan Priebe a =C3=A9crit : > Am 29.05.2012 23:31, schrieb Yann Dupont: >> on the contrary, pool data is jumping up & down, no matter how much >> thread involved :) >> >> Maybe this is because journal is too tight ? Or because 2 of the 8 n= odes >> have slower disks ? > Can you try with 3.0.X? I would be really interested what happens in=20 > this case. > > Stefan hum... probably not directly. Older btrfs won't like big metadata, I think.=20 This is quite a recent feature. but as my ceph is not in production, I can stop it, use an older kernel= =20 , format new volumes in btrfs or xfs, or whatever, and try. It will be a totally fresh install then. I can do that thursday. Stefan, mark, I'll take the latest 3.0 kernel - or do you have a particular 3.0 kerne= l=20 version to test ? And Do you want a particular xfs/btrfs format ? cheers, --=20 Yann Dupont - Service IRTS, DSI Universit=C3=A9 de Nantes Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont@univ-nantes.fr -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html