From owner-freebsd-current Sat Mar 8 8:13:56 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4DE8837B401 for ; Sat, 8 Mar 2003 08:13:54 -0800 (PST) Received: from smart.eusc.inter.net (smart.eusc.inter.net [213.73.101.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7F99343FB1 for ; Sat, 8 Mar 2003 08:13:53 -0800 (PST) (envelope-from msch@snafu.de) Received: from tc11-n67-110.de.inter.net ([213.73.67.110] helo=current.best-eng.de) by smart.eusc.inter.net with esmtp (Exim 3.36 #4) id 18rgxL-0004vB-00; Sat, 08 Mar 2003 17:13:52 +0100 Content-Type: text/plain; charset="us-ascii" From: Matthias Schuendehuette Reply-To: msch@snafu.de Organization: Micro$oft-free Zone To: Nuno Teixeira Subject: Re: softupdates && write cache && ata tags topic Date: Sat, 8 Mar 2003 17:13:50 +0100 User-Agent: KMail/1.4.3 Cc: freebsd-current@freebsd.org MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-Id: <200303081713.50636.msch@snafu.de> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi, > Is it safe to use softupdates + write cache + ata tags (IBM disk)? The summary of *my* experience and knowledge is: It is considered *unsave* to use Soft Updates with WriteCache enabled. I consider it unnecessary to use WriteCache if TaggedQueuing is enabled and working. (The performace gain of WriteCache and TaggedQueuing is more or less the same, the combination of both adds less than 10% of performance and you shouldn't use Soft Updates any more) Soft Updates alone add a huge amount of performance. So I recommend to use Soft Updates with Tagged Queuing enabled. -- Ciao/BSD - Matthias Matthias Schuendehuette , Berlin (Germany) Powered by FreeBSD 5.0-CURRENT To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message