From owner-freebsd-performance@FreeBSD.ORG Tue Apr 15 23:19:00 2003 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8DFB337B401 for ; Tue, 15 Apr 2003 23:19:00 -0700 (PDT) Received: from rms21.rommon.net (rms21.rommon.net [193.64.42.200]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4FBD843FD7 for ; Tue, 15 Apr 2003 23:18:59 -0700 (PDT) (envelope-from pete@he.iki.fi) Received: from PHE (h93.vuokselantie10.fi [193.64.42.147]) by rms21.rommon.net (8.12.6p2/8.12.6) with SMTP id h3G6Idqo085701; Wed, 16 Apr 2003 09:18:39 +0300 (EEST) (envelope-from pete@he.iki.fi) Message-ID: <072601c303e0$19a50a70$932a40c1@PHE> From: "Petri Helenius" To: References: <20030416024844.GC7867@ait.ac.th> <06a501c303d4$05c78de0$932a40c1@PHE> <20030416051413.GB653@atlantis.local.net> Date: Wed, 16 Apr 2003 09:19:12 +0300 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 cc: Jason Stone cc: freebsd-performance@freebsd.org cc: Alain Fauconnet Subject: Re: tweaking FreeBSD for Squid using X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Apr 2003 06:19:00 -0000 You mean ATA OVERLAP support? It seems to be there only with the former IBM drives. Does not seem to change that much. Your interrupt latency is usually three to four orders of magnitude smaller than disk latency anyway. I used to buy IBM drives but gave up because of reliability issues and changed over to WD. Pete > The last time I checked IDE drives were still sequential in their > access.. so by design a bottleneck for high performance databases > or squid.. and a burden for your cpu > > Lucio Jankok > > On Wed, Apr 16, 2003 at 07:52:34AM +0300, Petri Helenius wrote: > :> > :> I don't know. Seems that IDE disks evolve too fast for me nowadays. > :> That's also why I was writing that I'm not even sure that the old > :> stance "don't use IDE for servers" is still valid. > :> OOTH, I've had a lot of trouble with busy IDE-based (ASUS P4* m/b) > :> FreeBSD servers lately (hard hangs, see bug kern/44867). > :> > :Western digital Raptorīs spin at 10000rpm though they only come with 37 gig > :at the moment. So good for database applications but not for large scale storage. > : > :Pete > : > :_______________________________________________ > :freebsd-performance@freebsd.org mailing list > :http://lists.freebsd.org/mailman/listinfo/freebsd-performance > :To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org" > > -- > The whole problem with the world is that fools and fanatics are always > so certain of themselves, and wiser people so full of doubts. > --Bertrand Russell > >