RE: Device mapper multipathing

http://christophe.varoqui.free.fr/faq.html

A combination of a configuration setting like Freek suggested and changing a time out value should do it for you.

Rui Amaral

-----Original Message-----

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of D'Hooge Freek Sent: Tuesday, January 11, 2011 3:45 AM
To: zhuchao_at_gmail.com; Luca.Canali_at_cern.ch Cc: oracle-l
Subject: RE: Device mapper multipathing

Hi,

Can you post the contents of your /etc/multipath.conf file or the output of multipath -ll Possibly this is just a configuration setting.

Regards,

Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge_at_uptime.be
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer: www.uptime.be/disclaimer
---

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Zhu,Chao Sent: dinsdag 11 januari 2011 6:59
To: Luca.Canali_at_cern.ch
Cc: oracle-l
Subject: Re: Device mapper multipathing

not sure if anyone else has updated this thread since it was posted; We ran into issue of delayed path failover (when one path dies/disabled, all IO hang for 30sec-2 min); it wasn't that optimal to have that time IO totally freezed;

We were using redhat 5.4 and also tried oracle enterprise kernel;

Would be great to hear more inputs;

Thx

On Wed, Nov 29, 2006 at 7:08 PM, Luca Canali <Luca.Canali_at_cern.ch> wrote: Hi,

Is anybody who has used device mapper for Linux willing to share their experience?

I have been using Qlogic multipathing so far with the qla2300_conf module on RHEL3. No problem with it, but I am moving to RHEL4 and the needed qla2xxx_conf module is missing from their rmps distribution. So instead I have done a few tests with device mapper multipathing, seems to work fine so far, but nothing can beat real world experience.

Thanks,
L.
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Regards
Zhu Chao

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http://www.freelists.org/webpage/oracle-l Received on Tue Jan 11 2011 - 07:50:57 CST