[RegCNET] strange behaviour in RegCM paralell configuration

[XUNQIANG BI]

Hi, Ufuk:

You are using the bewolf cluster, right?

Are you sure the way you did is about the same as

http://www.ictp.trieste.it/~pubregcm/RegCM3/faq/parallel_1.txt


On Thu, 9 Aug 2007, [BE] Ufuk Utku Turuncoglu wrote:

> Hi,
>
> I try to run RegCM in parallel mode but when i submit job to cluster
> wrong number of process will be spawn in each node.
>
> For example, I define the total number of cpu as 24 and i am using 8 cpu
> nodes. so, i am using 3 nodes to create 24 porcess. When i check the
> number of process in each node and count them, it is not exactly 24.
> There are less process that i define in domain.param. I check the all
> configuration again and again and i could not find any problem.
>
> I have already run model successfully in 24 cpu using different input
> data (NCEP). But in this case (using ECHAM data) it is not running. But
> once time i faced same problem with NCEP case but after installing again
> of the model code, it solved and i could not find the bug. Is it
> possible to input data could generate error?

For ECHAM data preprocessing, I guess you add some lines in ICBC.f
(You are not using RegCM3_for_EH5OM_3.tar.gz, right?) ,
Does your ICBC file work with the serial code ?
>
> Also in buggy case, when i submit job, each one of the process runs like
> an single/independent job and writes the information to the regcm.out
> seperately. It means single processor version of RegCM runs in 24 cpu.

I guess that you are not submitting the parallel job in a right way.

The command I used is:

mpirun -np 24 ./regcm

I suggest that after you link the fort.10, fort.101, .... well
to the ICBC files, you'd better use the above line (instead of
regcm.x) to submit parallel job.

Regards,
Xunqiang Bi