Re: OpenSM Failover

Yevgeny Kliteynik
2009-10-14T08:46:37Z

Aaron,

Aaron Knister wrote:
>>> As I said, the older opensms
>>> on the older mellanox model HCAs failsover and failsback instantly.
>> The instant failback is expected, and this is the bug that
>> we're discussing. As for the instant failover - I'll check
>> how the things supposed to work and get back to you.

After checking this thing, I don't understand how the
instant failover is possible. The only case it can
work is if you don't have a switch in your subnet -
just two HCAs connected directly to each other.
Is this the case?

If not, then I'd like to see opensm logs.
Please run opensm as before (-V -s 0 -e).
Start OSM on node A with high priority.
Start OSM on node B with low priority.
Kill OSM on node A, and see that OSM on
node B becomes master.

I need only the log of the opensm on node B.
Best if you could just attach it to the bugzilla
issue form, but if you can't - you can mail it to me.

-- Yevgeny

>> -- Yevgeny
>>
>>> On Tue, Oct 13, 2009 at 11:32 AM, Yevgeny Kliteynik
>>> <kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> wrote:
>>>> Aaron,
>>>>
>>>> Thanks for the logs, this was really helpful.
>>>> Looks like there is a handover race in the OSM -
>>>> SM on node A misses the fact that SM on node B
>>>> have gave up its mastership.
>>>>
>>>> There is a bugzilla issue the describes all the
>>>> details of this race:
>>>>
>>>> https://bugs.openfabrics.org/show_bug.cgi?id=1499
>>>>
>>>> I've updated the issue form with your case, and we will continue
>>>> following
>>>> this bug there.
>>>>
>>>> -- Yevgeny
>>>>
>>>> Aaron Knister wrote:
>>>>> While the adapters have mellanox chipsets their actually IBM OEM
>>>>> branded and IBM hasn't released the 2.7 fw yet. I'm a little hesitant
>>>>> to apply the generic Mellanox FW.
>>>>>
>>>>> On Mon, Oct 12, 2009 at 4:22 AM, Yevgeny Kliteynik
>>>>> <kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> wrote:
>>>>>> Or Gerlitz wrote:
>>>>>>> Yevgeny Kliteynik wrote:
>>>>>>>> There was a hand-over problem in OFED 1.4, but later it turned out
>>>>>>>> to
>>>>>>>> be
>>>>>>>> FW issue. The thing is, FW version 2.6.648 doesn't have this bug any
>>>>>>>> more...
>>>>>>> so things should work fine with the newly released 2.7 firmware?
>>>>>> Yes
>>>>>>
>>>>>>> if this is still under question, Aaron, I suggest you open a bugzilla
>>>>>>> case
>>>>>>> @ https://bugs.openfabrics.org and we can track from there.
>>>>>> Good idea.
>>>>>>
>>>>>> -- Yevgeny
>>>>>>
>>>>>>> Or.
>>>>>>>
>>>>>>>