From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Kirkwood Subject: Re: Slow ceph fs performance Date: Fri, 28 Sep 2012 11:49:50 +1200 Message-ID: <5064E61E.2070800@catalyst.net.nz> References: <201209262054.q8QKsfwx007341@ayesha.phys.virginia.edu> <5064E3D7.6080002@catalyst.net.nz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from bertrand.catalyst.net.nz ([202.78.240.40]:46683 "EHLO mail.catalyst.net.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754952Ab2I0Xtw (ORCPT ); Thu, 27 Sep 2012 19:49:52 -0400 In-Reply-To: <5064E3D7.6080002@catalyst.net.nz> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: bryan@Virginia.EDU Cc: "Bryan K. Wright" , Mark Nelson , ceph-devel@vger.kernel.org Sorry Bryan - I should have read further down the thread and noted that you have this figured out... nothing to see here! On 28/09/12 11:40, Mark Kirkwood wrote: > Bryan - > > Note that the default block size for the rados bench is 4MB...and > performance decreases quite dramatically with smaller block sizes (-b > option to rados bench). >