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#1: Multipath

Posted on 2005-07-26 17:30:13 by Selim Daoud

Hi,

I am trying to configure multipath on a Sun SE3510FC (fibre channel)
the configuration wiht mdadm works fine and I can see or manipulat both path.
unfortunately as soon as I mount the md device, md_multipathd process
takes 99% of CPU and at some point, server is not accessible anymore
it's SUSE9SP2, with qlogic 2342 HBAs

Is the multipath really working or is it still under early dev?. This
is supposed to be running Oracle DB (production system) for my company
...do you reckon we can rely on this mutipathing at this point in time
or is it better to wait?

thanks

Selim
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#2: Re: Multipath

Posted on 2005-07-26 19:31:00 by Lars Marowsky-Bree

On 2005-07-26T16:30:13, Selim Daoud <selim.daoud@gmail.com> wrote:

> I am trying to configure multipath on a Sun SE3510FC (fibre channel)
> the configuration wiht mdadm works fine and I can see or manipulat bo=
th path.
> unfortunately as soon as I mount the md device, md_multipathd process
> takes 99% of CPU and at some point, server is not accessible anymore
> it's SUSE9SP2, with qlogic 2342 HBAs

In 2.6, work has shifted to Device-Mapper multipath.

In particular if you're running SLES9 SP2, please refer to the article
on multipathing at portal.suse.com (SDB). And if you have issues which
concern your production servers, you're going to be more happy with
asking them via your support contract instead of posting to public
mailing lists where people will tell you to try a vanilla kernel instea=
d
;-)


Sincerely,
Lars Marowsky-Br=E9e <lmb@suse.de>

--=20
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business -- Charles Darwin
"Ignorance more frequently begets confidence than does knowledge"

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