From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: new bottleneck section in wiki
Date: Wed, 2 Jul 2008 19:21:50 +0200 [thread overview]
Message-ID: <20080702172150.GB12081@rap.rap.dk> (raw)
In-Reply-To: <alpine.DEB.1.10.0807021241350.5166@p34.internal.lan>
On Wed, Jul 02, 2008 at 12:43:40PM -0400, Justin Piszcz wrote:
>
>
> On Wed, 2 Jul 2008, Keld Jørn Simonsen wrote:
>
> >The 66 MHz 64-bit PCI bus is capable of handling about 4 Gbit/s, or
> >about 500 MB/s. This can also be a bottleneck with bigger arrays, eg a 6
> >drive array will be able to deliver about 500 MB/s, and maybe you want
> >also to feed a gigabyte ethernet card - 125 MB/s, totalling potentially
> >625 MB/s on the PCI bus.
> >
> >The PCI-Express bus v1.1 has a limit of 250 MB/s per lane per dirction,
> >and that limit can easily be hit eg by a 4-drive array.
> Correction, can easily be hit with two veliciraptors.
OK, I added that information.
Best regards
keld
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next prev parent reply other threads:[~2008-07-02 17:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-02 15:56 new bottleneck section in wiki Keld Jørn Simonsen
2008-07-02 16:43 ` Justin Piszcz
2008-07-02 17:21 ` Keld Jørn Simonsen [this message]
2008-07-02 17:04 ` David Lethe
2008-07-02 17:51 ` Keld Jørn Simonsen
2008-07-02 18:08 ` David Lethe
2008-07-02 18:26 ` Keld Jørn Simonsen
2008-07-02 21:55 ` Roger Heflin
2008-07-02 19:45 ` Matt Garman
2008-07-02 20:05 ` Keld J?rn Simonsen
2008-07-02 20:24 ` Richard Scobie
2008-07-02 19:03 ` Matt Garman
2008-07-02 19:10 ` Jon Nelson
2008-07-02 19:35 ` Keld J?rn Simonsen
2008-07-02 19:38 ` Jon Nelson
2008-07-02 22:07 ` David Lethe
2008-07-03 12:28 ` Jon Nelson
2008-07-03 14:00 ` Justin Piszcz
2008-07-02 19:17 ` Robin Hill
2008-07-02 19:39 ` Keld J?rn Simonsen
2008-07-03 5:10 ` Doug Ledford
2008-07-02 21:45 ` Roger Heflin
2008-07-02 17:33 ` Iustin Pop
2008-07-02 18:14 ` Keld Jørn Simonsen
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