Date: Fri, 17 Sep 1999 17:16:53 +0200 From: Brad Knowles <blk@skynet.be> To: Thomas Dean <tomdean@ix.netcom.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: More benchmarking stuff... Message-ID: <v04205535b4080adcb6cf@[195.238.1.121]> In-Reply-To: <199909171505.IAA57153@ix.netcom.com> References: <v0420551eb407de6b4226@[195.238.1.121]> <v04205525b407f3131c41@[195.238.1.121]> <v0420552bb40800dd5b32@[195.238.1.121]> <199909171505.IAA57153@ix.netcom.com>
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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, <blk@skynet.be> 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
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