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Date:      Sat, 20 Mar 1999 08:55:27 -0800 (PST)
From:      Tom <tom@sdf.com>
To:        Nick Hilliard <nick@iol.ie>
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: dpt raid-5 performance
Message-ID:  <Pine.BSF.4.05.9903200850440.12986-100000@misery.sdf.com>
In-Reply-To: <199903191422.OAA27845@beckett.earlsfort.iol.ie>

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On Fri, 19 Mar 1999, Nick Hilliard wrote:

> If I set up a raid-5 system on these disks with a slice-size of 512K, the
> write performance is terrible.  Bonnie reports:

  512k will not result in very good single process write performance.
In fact, 512k is suboptimal for many operations on RAID-5 arrays.

  If you are optimizing for a single process, use something smaller (like
8k).

Tom



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