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Date: Tue, 9 Oct 2001 10:06:24 +0100 (BST)
From: Alistair Riddell <ali@gwc.org.uk>
To: David Chow <davidchow@rcn.com.hk>
cc: raid@ddx.a2000.nu, linux-kernel@vger.kernel.org,
        linux-raid@vger.kernel.org
Subject: Re: write/read cache raid5
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On Tue, 9 Oct 2001, David Chow wrote:

> Yes my server serve lots of clients and have lots of NICs even
> gigabit... how can I increase write/read cache on RAID5 ? It is better
> performed when big cache allows on top (before) raid computation work
> and physical disk writes.

In that case more memory will certainly help. You might like to check out
Jens Axboe's block-highmem patch if you have more than 1GB of RAM. It
allows hardware to DMA direct to high memory, rather than using bounce
buffers, which can increase performance considerably.

-- 
Alistair Riddell - BOFH
IT Manager, George Watson's College, Edinburgh
Tel: +44 131 447 7931 Ext 176       Fax: +44 131 452 8594
Microsoft - because god hates us

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