[MITgcm-support] Question about parallel run

[Ali Nazemian]

So you meant i can specify different size.h file with -mods parameter in
genmake2 command? hereby i can add this to job scheduling file for SGE and
the problem will be solved.
Regards.

On Tue, Jun 14, 2011 at 11:10 PM, Martin Losch <Martin.Losch at awi.de> wrote:

> Ali,
>
> you do not need different source code for each configuration, only your
> SIZE.h needs to change when you build the executable "mitgcmuv". I usually
> have different subdirectories when I want to try different numbers of cpus.
> The makefile-procedures just links the source code into the build directory
> so that you can use the same source code for all of you runs, except for
> SIZE.h which should then reside in a separate directory (specified by -mods
> at the genmake2 step).
>
> The code is based on Fortran77, so all memory is allocated statically. I do
> not know of any plans to change that in the future.
>
> Martin
> On Jun 14, 2011, at 11:12 AM, Ali Nazemian wrote:
>
> > Thanks a lot.
> > So i should have a different source code per each run configuration and
> use it for example with SGE as a job scheduler?
> > Is it in developer road map to make MITgcm more portable? i mean change
> parallel configuration to runtime instead of compile time?
> > Regards.
> >
> > On Tue, Jun 14, 2011 at 6:10 PM, Stefano Querin <squerin at ogs.trieste.it>
> wrote:
> > Hi Ali,
> >
> >
> > Hi,
> > I am wondering that should i recompile MITgcm each time that i want to
> run that on our cluster with different number of processors?!
> >
> > Yes (as far as I know...), you have to recompile it.
> >
> >
> > assume i want to run it on 10 processors, 16 processors , 20 processors
> and etc... should i change size.h file each time and recompile my code?
> >
> > Yes.
> > For more info:
> > http://mitgcm.org/public/r2_manual/latest/online_documents/node102.html
> > http://mitgcm.org/public/r2_manual/latest/online_documents/node181.html
> >
> >
> > what if two or more user want to submit parallel job with MITgcm with
> different number of processors?
> >
> > Just run them on separate folders...
> > If many people want to perform several runs, you should also have a job
> scheduler installed on your cluster to handle the job queues.
> > Ask your system administrator.
> >
> >
> > have i need a different compiled code for each of them?!
> >
> > Yes, one executable for each kind of domain decomposition.
> >
> > Best Regards.
> > --
> > A.Nazemian
> >
> > Cheers,
> >
> > S.
> >
> >
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> > http://mitgcm.org/mailman/listinfo/mitgcm-support
> >
> >
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> >
> >
> >
> > --
> > A.Nazemian
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
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-- 
A.Nazemian
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