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From: Alistair Riddell <>
To: David Chow <>
Subject: Re: write/read cache raid5
Date: Tue, 9 Oct 2001 10:06:24 +0100 (BST)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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] <>
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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