Date: Sun, 1 Oct 2000 05:52:36 +0200 From: "Karsten W. Rohrbach" <karsten@rohrbach.de> To: Greg Lehey <grog@lemis.com> Cc: Esko Petteri Matinsola <esko@kapi.net>, Clark Shishido <clark@desktop.com>, hackers@FreeBSD.ORG Subject: Re: Vinum RAID-5 performance problem Message-ID: <20001001055235.G83678@rohrbach.de> In-Reply-To: <20000909113319.E5876@wantadilla.lemis.com>; from grog@lemis.com on Sat, Sep 09, 2000 at 11:33:19AM %2B0930 References: <Pine.BSF.4.10.10009082147290.46483-100000@sputnik> <v0422080bb5def254254a@[192.168.1.42]> <Pine.BSF.4.10.10009082147290.46483-100000@sputnik> <20000909113319.E5876@wantadilla.lemis.com>
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Greg Lehey(grog@lemis.com)@Sat, Sep 09, 2000 at 11:33:19AM +0930: [...] > depends on what you're trying to do. But yes, having only two > controllers will halve your RAID-5 write performance. Note also that > with a 256 kB stripe, you'll run into drive contention problems > because all your superblocks will be on the same subdisk. Take a size > like 273 kB, for example. or (now proven fact) grog's first guess to solve my config problems: 511k ;-) which ran like a charm on dang big box (32x18.3gig) greg, you should underline that fact in your docs at a prominent location. i think that using a plex size which is even or too small are the most common configuration mistakes the people do... /k -- > If you think sex is a pain in the ass, try a different position. KR433/KR11-RIPE -- http://www.webmonster.de -- ftp://ftp.webmonster.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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