From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: poor OSD performance using kernel 3.4 Date: Tue, 29 May 2012 16:43:53 +0200 Message-ID: <4FC4E0A9.8010008@profihost.ag> References: <5970d59f-9531-4f60-8600-3e1268824c83@mailpro> <4FC49B12.8020004@profihost.ag> <4FC4D1A8.1080001@univ-nantes.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:34234 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751503Ab2E2Onx (ORCPT ); Tue, 29 May 2012 10:43:53 -0400 In-Reply-To: <4FC4D1A8.1080001@univ-nantes.fr> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Yann Dupont Cc: ceph-devel@vger.kernel.org Am 29.05.2012 15:39, schrieb Yann Dupont: > On 29/05/2012 11:46, Stefan Priebe - Profihost AG wrote: >> It would be really nice if somebody from inktank can comment this whole >> sitation. >> > Hello. > I think I have the same bug : > > My setup is with 8 OSD nodes, 3 MDS (1 active) & 3 MON. > All my machines are debian, using a custom 3.4.0 kernel. Ceph is > 0.47.2-1~bpo60+1 (debian package) That sounds absolutely like the same issue. Sadly nobody from inktank has replied to this problems for the last days. > As you can see, much more stable bandwith with this pool. That's pretty strange... > I understand data & rbd pool probably don't use the same internals, but > is this difference expected ? There must be differences in pool handling. Stefan