[dm-devel] multipath features

[Peter Koutoupis]

Thank you very much for your quick response.  I can give this a try and
tweak it as I go along.

Peter 

-----Original Message-----
From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com]
On Behalf Of Eli Stair
Sent: Wednesday, October 25, 2006 3:53 PM
To: device-mapper development
Subject: Re: [dm-devel] multipath features


Check multipath.conf.annotated in the source.  This will retry n times
before failing.

    no_path_retry           {n}

I have repeatable issues with setting this higher than about 3-5
however, where IO queues (more like blocks) forever, even after failing
the path back... requiring a reboot, and resulting in data corruption.
YMMV.


/eli




Peter Koutoupis wrote:
> I cannot seem to find an answer for this no matter where I look, but 
> if I wanted to queue all IO if there was no path for a LIMITED time 
> before it eventually times out, does a feature exist?  Currently I am 
> using "1 queue_if_no_path" but the last thing I want is for a path to 
> be unavailable and have it consume all host resources until the host 
> cannot handle it anymore.  Thanks in advance.
> 
> Regards,
> 
> Peter Koutoupis
> Systems Engineer
> Xyratex International, Inc.
> 1804 Centre Point Circle
> Suite 112
> Naperville, IL 60563 USA
> (630)364-7656
> 
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