RE: Device mapper multipathing

From: Amaral, Rui <>
Date: Tue, 11 Jan 2011 08:50:57 -0500
Message-ID: <1B861F1ABE40A84AA92AD585B20C558B26EBC56BB3_at_EX7T2-CV06.TDBFG.COM>

Also check point 8 here:

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: [] On Behalf Of D'Hooge Freek Sent: Tuesday, January 11, 2011 3:45 AM
To:; Cc: oracle-l
Subject: RE: Device mapper multipathing


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


Freek D'Hooge
Oracle Database Administrator
tel +32(0)3 451 23 82

From: [] On Behalf Of Zhu,Chao Sent: dinsdag 11 januari 2011 6:59
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;


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



Zhu Chao


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-- Received on Tue Jan 11 2011 - 07:50:57 CST

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