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Date:      Thu, 21 Nov 1996 14:51:56 +1100 (EST)
From:      michael butler <imb@scgt.oz.au>
To:        dwoods@netgazer.com (Darrin R. Woods)
Cc:        hackers@FreeBSD.org
Subject:   Re: Disk Striping
Message-ID:  <199611210351.OAA03624@asstdc.scgt.oz.au>
In-Reply-To: <v03007800aeb8eb647bf6@[208.12.177.224]> from "Darrin R. Woods" at "Nov 20, 96 11:14:31 am"

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Darrin R. Woods writes:

> I just got my news server up and running INN (thanks to everyone that
> helped), but now I'm looking for a better way of dealing with it.  I've got
> 3 Fast/Wide 4gb disks to hold news.  It would be a lot easier (and better
> performance) if I could stripe (or span) the /var partition accross the 3
> disks instead of having to guess as to how to partition each drive and into
> what sizes.

With "only" three drives, you don't want to stripe across them.

There are four activities which consume disk resources:

	i) maintenance of the active and history files
	ii) maintenance of the overview hierarchy
	iii) writing out the articles themselves
	iv) scribbling to /var/log/news

Whilst the latter is comparatively "cheap" as it simply extends an existing
file (writes deferred by caching), the first three are best spread across
separate spindles for the best resultant performance. Striping or
concatenation will hurt more than help,

	michael



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