Date: Fri, 17 Dec 1999 17:34:08 +0100 From: Brad Knowles <blk@skynet.be> To: David Gilbert <dgilbert@velocet.ca>, Mike Smith <msmith@FreeBSD.ORG> Cc: David Gilbert <dgilbert@velocet.ca>, freebsd-current@FreeBSD.ORG Subject: Re: AMI MegaRAID datapoint. Message-ID: <v04220809b4801618502e@[195.238.1.121]> In-Reply-To: <14426.20641.329657.464545@trooper.velocet.net> References: <14425.2778.943367.365945@trooper.velocet.net> <199912162354.PAA02071@mass.cdrom.com> <14426.20641.329657.464545@trooper.velocet.net>
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At 10:02 AM -0500 1999/12/17, David Gilbert wrote: > Well... it's RAID-5 across the same 8 drives with all 8 drives on one > LVD chain (same configuration as the other test). I have tried the > 128k stripe, but it was slower than the default 64k stripe. One of the lessons I learned from Greg was that, when dealing with RAID implementations in hardware, you should usually take their "native" stripe size, since that's the one that will usually perform best. It's only when you do software RAID (e.g., vinum) that you can choose larger or smaller stripe sizes with a reasonable expectation that you will get the particular performance enhancement that you're hoping for. -- 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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