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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
Date: Tue, 9 Oct 2001 10:06:24 +0100 (BST)	[thread overview]
Message-ID: <Pine.LNX.4.21.0110091004450.27693-100000@frank.gwc.org.uk> (raw)
In-Reply-To: <3BC26BDE.45D893A6@rcn.com.hk>

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


  reply	other threads:[~2001-10-09  9:06 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <E15qh8U-0001o8-00@the-village.bc.nu>
2001-10-08 21:10 ` raid
2001-10-08 21:17   ` Alistair Riddell
2001-10-09  3:15     ` David Chow
2001-10-09  9:06       ` Alistair Riddell [this message]
2001-10-08 21:29   ` Alan Cox
2001-10-13 13:14     ` Nico Dummer
2001-10-08 12:01 raid

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