[gmx-users] "Lam" is not required for running parallel job

[Jochen Hub]

sunita at chem.iitb.ac.in wrote:
>> ----- Original Message -----
>> From: sunita at chem.iitb.ac.in
>> Date: Wednesday, February 13, 2008 5:40 pm
>> Subject: [gmx-users] "Lam" is not required for running parallel job
>> To: gmx-users at gromacs.org
>>
>>     
>>> Dear Users,
>>>
>>> Lam doesn't seem to be essential for running parallel job.
>>>       
>> An MPI library is essential.
>>
>>     
>>> Because in one of our Xeon machine with quardcore 1.6 Ghz
>>> processor and
>>> with 6 nodes we installed parallel version of gromacs (version
>>> 3.3.1) and
>>> its running without any problem. Lam is not installed in this machine
>>> still it is running the parallel job.
>>>       
>> How are you running grompp and mdrun, and what makes you think the
>> calculation is running in parallel?
>>
>>     
> I used the following command to run parallel job and tested it by
> generating .tpr file for 2 nodes, 4 nodes and 6 nodes. With 6 nodes it
> took least time to finish the mdjob.
>
> grompp -np 6 -f ......
> mpirun -np 6 mdrun_mpi -v -s .....
>   
mpirun is part of some MPI implementation such as LAM or MPICH. If you 
want to find out which implementation you are using try commands such as
mpirun --help  or
which mpirun

Jochen


> It seems correct to me.
> What do you say?
>
>
>   
>>> Is it taken care in the newer gromacs version that lam is not
>>> required?
>>>       
>> No.
>>
>> Mark
>> _______________________________________________
>> gmx-users mailing list    gmx-users at gromacs.org
>> http://www.gromacs.org/mailman/listinfo/gmx-users
>> Please search the archive at http://www.gromacs.org/search before posting!
>> Please don't post (un)subscribe requests to the list. Use the
>> www interface or send it to gmx-users-request at gromacs.org.
>> Can't post? Read http://www.gromacs.org/mailing_lists/users.php
>>
>>     
>
>
> _______________________________________________
> gmx-users mailing list    gmx-users at gromacs.org
> http://www.gromacs.org/mailman/listinfo/gmx-users
> Please search the archive at http://www.gromacs.org/search before posting!
> Please don't post (un)subscribe requests to the list. Use the 
> www interface or send it to gmx-users-request at gromacs.org.
> Can't post? Read http://www.gromacs.org/mailing_lists/users.php
>
> .
>
>   


-- 
************************************************
Jochen Hub
Max Planck Institute for Biophysical Chemistry
Computational biomolecular dynamics group
Am Fassberg 11
D-37077 Goettingen, Germany
Email: jhub[at]gwdg.de
************************************************