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Message-ID: <3D11360F.4EA4807D@zip.com.au>
Date: Wed, 19 Jun 2002 18:55:27 -0700
From: Andrew Morton <akpm@zip.com.au>
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To: mgross@unix-os.sc.intel.com
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       lse-tech@lists.sourceforge.net, richard.a.griffiths@intel.com
Subject: Re: ext3 performance bottleneck as the number of spindles gets large
References: <200206200022.g5K0MKP27994@unix-os.sc.intel.com>
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mgross wrote:
> 
> We've been doing some throughput comparisons and benchmarks of block I/O
> throughput for 8KB writes as the number of SCSI addapters and drives per
> adapter is increased.
> 
> The Linux platform is a dual processor 1.2GHz PIII, 2Gig or RAM, 2U box.
> Similar results have been seen with both 2.4.16 and 2.4.18 base kernel, as
> well as one of those patched up O(1) 2.4.18 kernels out there.

umm.  Are you not using block-highmem?  That is a must-have.

http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19pre9aa2/00_block-highmem-all-18b-12.gz

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