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Date:      Tue, 28 May 2002 17:01:25 +0930
From:      Greg 'groggy' Lehey <grog@FreeBSD.org>
To:        Lamont Granquist <lamont@scriptkiddie.org>
Cc:        Cy Schubert - CITS Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>, Kirk Strauser <kirk@strauser.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Hardware RAID vs vinum
Message-ID:  <20020528170125.S16567@wantadilla.lemis.com>
In-Reply-To: <20020528002940.G449-100000@coredump.scriptkiddie.org>
References:  <20020528095948.D16567@wantadilla.lemis.com> <20020528002940.G449-100000@coredump.scriptkiddie.org>

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On Tuesday, 28 May 2002 at  0:30:35 -0700, Lamont Granquist wrote:
>
>
> On Tue, 28 May 2002, Greg 'groggy' Lehey wrote:
>> On Monday, 27 May 2002 at  6:02:23 -0700, Cy Schubert - CITS Open Systems Group wrote:
>>>
>>> It turned out that moving the application to hardware RAID improved
>>> performance by 40 times.
>>
>> This can only happen if there's something very wrong with the software
>> RAID-5, either the implementation or the configuration.
>
> My first thought was cache on the hardware RAID array.

Mine too.  But that wouldn't normally give that much of on
improvement.

Greg
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