From: Mario 'BitKoenig' Holbe <Mario.Holbe@TU-Ilmenau.DE>
To: linux-raid@vger.kernel.org
Subject: Re: paralellism of device use in md
Date: Wed, 18 Jan 2006 09:16:30 +0100 [thread overview]
Message-ID: <dqktgu$fea$1@sea.gmane.org> (raw)
In-Reply-To: dqkrfm$9k9$1@sea.gmane.org
Mario 'BitKoenig' Holbe <Mario.Holbe@TU-Ilmenau.DE> wrote:
> scheduled read-requests. Would it probably make sense to split one
> single read over all mirrors that are currently idle?
A I got it from the other thread - seek times :)
Perhaps using some big (virtual) chunk size could do the trick? What
about using chunks that big that seeking is faster than data-transfer...
assuming a data rate of 50MB/s and 9ms average seek time would result in
at least 500kB chunks, 14ms average seek time would result in at least
750kB chunks.
However, since the blocks being read are most likely somewhat close
together, it's not a typical average seek, so probably smaller chunks
would also be possible.
regards
Mario
--
<Sique> Huch? 802.1q? Was sucht das denn hier? Wie kommt das ans TAGgeslicht?
next prev parent reply other threads:[~2006-01-18 8:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-17 12:09 paralellism of device use in md Andy Smith
2006-01-17 23:04 ` Neil Brown
2006-01-18 0:23 ` Tim Moore
2006-01-18 7:41 ` Mario 'BitKoenig' Holbe
2006-01-18 8:16 ` Mario 'BitKoenig' Holbe [this message]
2006-01-18 17:55 ` Francois Barre
2006-01-18 23:34 ` Neil Brown
2006-01-22 16:43 ` Tuomas Leikola
2006-01-19 11:30 ` Mario 'BitKoenig' Holbe
2006-01-18 9:50 ` Andy Smith
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