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From: Andreas Dilger <adilger@clusterfs.com>
Date: Sat, 22 Jun 2002 22:33:10 -0600
To: "Christopher E. Brown" <cbrown@woods.net>
Cc: "Griffiths, Richard A" <richard.a.griffiths@intel.com>,
       "'Andrew Morton'" <akpm@zip.com.au>, mgross@unix-os.sc.intel.com,
       "'Jens Axboe'" <axboe@suse.de>,
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Subject: Re: ext3 performance bottleneck as the number of spindles gets large
Message-ID: <20020623043310.GL22411@clusterfs.com>
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On Jun 22, 2002  22:02 -0600, Christopher E. Brown wrote:
> On Thu, 20 Jun 2002, Griffiths, Richard A wrote:
> 
> > I should have mentioned the throughput we saw on 4 adapters 6 drives was
> > 126KB/s.  The max theoretical bus bandwith is 640MB/s.
> 
> This is *NOT* correct.  Assuming a 64bit 66Mhz PCI bus your MAX is
> 503MB/sec minus PCI overhead...

Assuming you only have a single PCI bus...

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/

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