From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 24 Sep 2001 11:32:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 24 Sep 2001 11:31:56 -0400 Received: from krusty.E-Technik.Uni-Dortmund.DE ([129.217.163.1]:44036 "HELO krusty.e-technik.uni-dortmund.de") by vger.kernel.org with SMTP id ; Mon, 24 Sep 2001 11:31:47 -0400 Date: Mon, 24 Sep 2001 17:32:10 +0200 From: Matthias Andree To: linux-kernel@vger.kernel.org, reiserfs-list@namesys.com Subject: Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better Message-ID: <20010924173210.A7630@emma1.emma.line.org> Mail-Followup-To: linux-kernel@vger.kernel.org, reiserfs-list@namesys.com In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.22.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 24 Sep 2001, Beau Kuiper wrote: > Also, the performace problems seem to be very dependant on the hardware being > used. 5400rpm drives get hurt a lot, while 7200 rpm drives seem to handle it > better. Decent write caching on IDE devices (like the 2meg buffer on the IBM) > can completely hide this issue. Decent write caching on IDE devices can eat your whole file system. Turn it off (I have no idea of internals, but I presume it'll still be a write-through cache, so reading back will still be served from the buffer). Do hdparm -W0 /dev/hd[a-h]. One might consider adding TCQ to the IDE driver. FreeBSD already has it, and IBM drives talk it.