[mpich-discuss] Hydra: LSF resource querying in exclusive mode

[Yauheni Zelenko]

Hi!

I tried to submit sample jobs on LSF 7.0.5.

For bsub -x -n 2 LSB_MCPU_HOSTS contains 2.

For bsub -x -R "CPUS>=2" LSB_MCPU_HOSTS contains 1.

In both cases physical host may contains more CPUs which still may be used by applications.

Eugene.
________________________________________
From: Pavan Balaji [balaji at mcs.anl.gov]
Sent: Wednesday, November 10, 2010 6:32 PM
To: Yauheni Zelenko
Cc: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] Hydra: LSF resource querying in exclusive mode

On 11/10/2010 07:58 PM, Yauheni Zelenko wrote:
> Problem will be with CPUS>=Value, when more CPUs are granted then
> reported by LSB_MCPU_HOSTS.

If the user passed "-n 2", LSB_MCPU_HOSTS should be 2 even if there are
4 processors on the system. That's the expected behavior.

I'm repeating my question here:

If it sets the value passed to the "-n" parameter of bsub, that's the
correct behavior -- this is what we want it to do.

If it sets the value to "1", that's incorrect.

So which one does it set? The value given to "-n" or "1"?

  -- Pavan

--
Pavan Balaji
http://www.mcs.anl.gov/~balaji