From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756618AbXGIPbR (ORCPT ); Mon, 9 Jul 2007 11:31:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754224AbXGIPbF (ORCPT ); Mon, 9 Jul 2007 11:31:05 -0400 Received: from [212.12.190.92] ([212.12.190.92]:34221 "EHLO raad.intranet" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753740AbXGIPbD (ORCPT ); Mon, 9 Jul 2007 11:31:03 -0400 From: Al Boldi To: Rogier Wolff Subject: Re: Fwd: Re: RAID performance is not too well.... Date: Mon, 9 Jul 2007 18:30:51 +0300 User-Agent: KMail/1.5 References: <20070709113916.GA9781@bitwizard.nl> In-Reply-To: <20070709113916.GA9781@bitwizard.nl> Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200707091830.51707.a1426z@gawab.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rogier Wolff wrote: > > >I have an application that creates some 228 thousand files, > > >spread over about 4000 directories. Total is not more than > > >1.3Gb. (I'm not sure, and I don't care if it's 10% or 90% of > > >that number) > > > > > >Anyway, I've loaded all of the 1.3Gb into the cache (the machine > > >has 8Gb of RAM), so that only writes need to take place. > > > > > >After a while the machine goes into a routine of writing > > >about 500 to 1000kbytes per second. > > > > > >Sync seems to take a long time: The as-iosched has a sync bug, and if you are using that, then try deadline instead. Thanks! -- Al