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

[Hannes Reinecke <hare suse de>]

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
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