From owner-freebsd-current Fri Sep 17 8:17:40 1999 Delivered-To: freebsd-current@freebsd.org Received: from out0.mx.skynet.be (out0.mx.skynet.be [195.238.2.35]) by hub.freebsd.org (Postfix) with ESMTP id 492911585D for ; Fri, 17 Sep 1999 08:17:31 -0700 (PDT) (envelope-from blk@skynet.be) Received: from [195.238.1.121] (brad.techos.skynet.be [195.238.1.121]) by out0.mx.skynet.be (8.9.3/odie-relay-v1.0) with ESMTP id RAA18135; Fri, 17 Sep 1999 17:17:23 +0200 (MET DST) Mime-Version: 1.0 X-Sender: blk@foxbert.skynet.be Message-Id: In-Reply-To: <199909171505.IAA57153@ix.netcom.com> References: <199909171505.IAA57153@ix.netcom.com> Date: Fri, 17 Sep 1999 17:16:53 +0200 To: Thomas Dean From: Brad Knowles Subject: Re: More benchmarking stuff... Cc: freebsd-current@FreeBSD.ORG Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 8:05 AM -0700 1999/9/17, Thomas Dean wrote: > These tests with softupdates do not appear to be a test of the disk > i/o system, but, a test of memory. > > Are the files deleted before they are actually written to disk? Good question. I don't know the answer. I know that the process is to create all the files first, then operate on them (including deletions and more creations), and then finally do a removal of all of them as quickly as possible at the end of the test. I'd be willing to guess a lot of files do get created and then deleted before the data ever gets written to disk. After all, postmark was written to simulate the kind of a load that a heavily-used mail system places on the machine, and that's precisely the sort of environment where something like softupdates or mounting filesystems async does tend to help the most. -- These are my opinions -- not to be taken as official Skynet policy ____________________________________________________________________ |o| Brad Knowles, Belgacom Skynet NV/SA |o| |o| Systems Architect, News & FTP Admin Rue Col. Bourg, 124 |o| |o| Phone/Fax: +32-2-706.11.11/12.49 B-1140 Brussels |o| |o| http://www.skynet.be Belgium |o| \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ Unix is like a wigwam -- no Gates, no Windows, and an Apache inside. Unix is very user-friendly. It's just picky who its friends are. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message