RE: RAID1 read balancing

Jorge Boncompte (jorge@dti2.net)
Mon, 12 Feb 2001 12:36:21 +0100


Hi!

Could you provide an URL to that patch? I would like to test it.

Regards.

-Jorge

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Jorge Boncompte - Técnico de sistemas
DTI2 - Desarrollo de la Tecnología de las Comunicaciones
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----- Mensaje original -----
De: "Arjan van de Ven" <arjan@fenrus.demon.nl>
Para: "Petru Paler" <ppetru@ppetru.net>
CC: <linux-kernel@vger.kernel.org>
Enviado: lunes, 12 de febrero de 2001 10:34
Asunto: Re: RAID1 read balancing

> In article <20010211161242.A949@ppetru.net> you wrote:
>
> > For a RAID1 array built of two disks on two separate SCSI controllers,
> > are the reads balanced between the two controllers (for higher speed) ?
>
> With the current RAID1 setup, you will NOT get a speed increase for
> single-threaded, sequential reading programs (read: benchmarks like hdparm
> and tiobench)[1]. You will get improvents in all other cases.
>
> Greetings,
> Arjan van de Ven
>
>
> [1] This can be fix by a 10 line patch, however this changes the on-disk
> layout.
> -
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