[dm-devel] Different Path priorities for iSCSI and FC paths toa combination lun.

[Srinivas Ramani]

Thanks Tore .
I plan to add mpath_prio_alua_pillar to the code base to return different priorities for iSCSI and FC paths for
combination luns .
 
 
With Regards
Srini

________________________________

From: dm-devel-bounces at redhat.com on behalf of Tore Anderson
Sent: Tue 4/29/2008 1:06 PM
To: device-mapper development
Subject: Re: [dm-devel] Different Path priorities for iSCSI and FC paths toa combination lun.



Hi,

* Srinivas Ramani

> I would be grateful to learn from this forum on how one would be able
> to have different path priorities for a FC / iSCSI  paths to a
> multiprotocol FC/iSCSI combination lun using device mapper . The
> intention is that a  FC path should have a higher priority than an
> iSCSI path to the same lun. Is it possible to do it with a
> configuration change or would one need to  add this feature to the
> mpath_prio_alua  code.

Make a small wrapper script that invokes mpath_prio_alua and also checks
if the path is to a iSCSI volume or not (you can probably determine this
by looking somewhere beneath /sys/block/$dev/).  If it is, add 100 to
whatever mpath_prio_alua returned, and print the sum.

Regards
--
Tore Anderson

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