[dm-devel] multipath-tools with STK FLEXLINE 380
Hannes Reinecke
hare at suse.de
Wed Nov 22 15:29:16 UTC 2006
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 at suse.de
SuSE Linux Products GmbH S390 & zSeries
Maxfeldstraße 5 +49 911 74053 688
90409 Nürnberg http://www.suse.de
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