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Re: [dm-devel] multipath-tools with STK FLEXLINE 380



Tony Lapointe wrote:
                Do not use 'rr_weight=priorities'. The priorities
                handling is currently buggered; or, put it the other way
                round, you will need at least my latest fix to get it
                working. Just remove that line and stay with the
                defaults. That should work.
And as a sidenote: Using 'group_by_prio' and
                'rr_weight=priorities' is completely pointless, even if
                'rr_weight=priorities' should be working.'group_by_prio'
                will lump all devices with the same priority into one
                group. And 'rr_weight=priorities' will then modify the
                'minio' based on the priority. So you can as well
                directly modify the 'minio'
                parameter.'rr_weight=priorities' only makes sense if you
                have path with different priorities in one group, ie
                when using 'multibus' or 'group_by_serial'.
                Cheers,
Hannes
                --
                Dr. Hannes Reinecke			hare suse de
                SuSE Linux Products GmbH		S390 & zSeries
                Maxfeldstraße 5				+49 911 74053 688
                90409 Nürnberg				http://www.suse.de




Hi Hannes,

thanks for the reply.

I've tried without "rr_weight=priorities" in my multipath.conf but  it does
> not work either.
The only difference it makes is that "multipath -v3" now output :
> "rr_weight = 1 (internal default)"
instead of "rr_weight = 2 (config file default)".

I was thinking that "group_by_prio" is use to group together devices with
> differents priorities, with the one with the highest priority first, is it wrong?

Yes. It groups devices with _identical_ priorities together.

The output of "multipath -d -v2" seems to reflect this :

[ .. ]

The output is correct. You have two paths to each disk, and each path has a different priority. So the multipath topology is correct.

Cheers,

Hannes
--
Dr. Hannes Reinecke			hare suse de
SuSE Linux Products GmbH		S390 & zSeries
Maxfeldstraße 5				+49 911 74053 688
90409 Nürnberg				http://www.suse.de


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