From owner-freebsd-questions Mon Jul 10 7:26:34 2000 Delivered-To: freebsd-questions@freebsd.org Received: from mail2.netcologne.de (mail2.netcologne.de [194.8.194.103]) by hub.freebsd.org (Postfix) with ESMTP id ACFC937B816 for ; Mon, 10 Jul 2000 07:26:29 -0700 (PDT) (envelope-from pherman@frenchfries.net) Received: from bagabeedaboo.security.at12.de (dial-195-14-233-159.netcologne.de [195.14.233.159]) by mail2.netcologne.de (8.9.3/8.9.3) with ESMTP id QAA13523; Mon, 10 Jul 2000 16:26:24 +0200 (MET DST) Received: from localhost (localhost.security.at12.de [127.0.0.1]) by bagabeedaboo.security.at12.de (8.10.2/8.10.2) with ESMTP id e6AEQCA56277; Mon, 10 Jul 2000 16:26:12 +0200 (CEST) Date: Mon, 10 Jul 2000 16:26:12 +0200 (CEST) From: Paul Herman To: Salvo Bartolotta Cc: Doug Barton , freebsd-questions@FreeBSD.ORG Subject: Re: Softupdates question In-Reply-To: <20000710.13040500@bartequi.ottodomain.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 10 Jul 2000, Salvo Bartolotta wrote: > Essentially, I thought that avoiding these writes in conjunction with > softupdates (smart metadata management) would not do harm. > > Also, a number of posts had showed that a few people were actually > using softupdates *and* noatime. Now you guys are just being silly. Do you even notice the difference? I mean, this sort of metadata isn't handled synchronously by softupdates anyway. Softupdates is pretty smart as it is. A very intensive "find /usr/ports" lasting 2 minutes (that's 12700+ directories, nearly 100 atime updates per second with many bufdaemon wakeups during that time) showed me only a 2% time difference between atime and noatime with softupdates. Now really... ...and that isn't even realistic behaviour for a server. Tell me, where would this make a difference (and how much)? Numbers numbers numbers... -Paul. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message