Re: [dm-devel] DM-MP, Xen 5.0.0 and NetApp

[root CMPXEN02 ~]# multipath -ll
360a98000572d42774e6f4f2f682f6330dm-0 NETAPP,LUN
[size=20G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=32][active]
\_ 0:0:0:0 sda        8:0   [active][ready]
\_ 0:0:1:0 sdb        8:16 [active][ready]
\_ 1:0:0:0 sdd        8:48 [active][ready]
\_ 1:0:1:0 sde        8:64 [active][ready]
\_ 2:0:0:0 sdh        8:112 [active][ready]
\_ 3:0:0:0 sdi        8:128 [active][ready]
\_ 3:0:1:0 sdj        8:144 [active][ready]
\_ 2:0:1:0 sdk        8:160 [active][ready]
\_ round-robin 0 [prio=7][enabled]
\_ 0:0:2:0 sdc        8:32 [active][ready]
\_ 1:0:2:0 sdf        8:80 [active][ready]
\_ 1:0:3:0 sdg        8:96 [active][ready]
\_ 3:0:2:0 sdl        8:176 [active][ready]
\_ 3:0:3:0 sdn        8:208 [active][ready]
\_ 0:0:3:0 sdo        8:224 [active][ready]
\_ 2:0:3:0 sdp        8:240 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:2:0 sdm        8:192 [failed][faulty]

On Wed, Apr 1, 2009 at 11:36 AM, Hannes Reinecke <hare suse de> wrote:

Rodrigo Nascimento wrote:

Hi All,
I'm having problems to put the Multipathing tools to work correctly with NetApp Cluster Solution.
I have a xenpool with 3 machines the multipathing are enabled on them, the HBA are Qlogic, two FAS3140 controllers in Cluster. I created a lun to be a storage repository (SR), the lun is visible and was recognized on the 3 machines, but when we say to the XenServer to build a SR with this Lun, all I/O operations arrive to the FAS3140 by the non-optimized path.
*XenServer multipath.conf*
defaults {
user_friendly_names no
}
devices {
device {
vendor "NETAPP"
product "LUN"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_netapp /dev/%n"
features "1 queue_if_no_path"
path_checker directio
failback immediate
}
}
We made two tests, one with prio_callout as /sbin/mpath_prio_alua and other with prio_callout as /sbin/mpath_prio_netapp, both returns the same results.

What's the output of 'multipath -ll'?
Looks like all paths are configured into one group here.

Cheers,

Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare suse de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)

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