[gmx-users] Option -shuffle, -sort, -np missing in grompp in version 4.0?

2008-10-11 Thread Lee Soin
The command grompp used to have options -shuffle, -sort and -np, but it
seems that they appear no more with version 4.0?

-- 
Sun Li
Department of Physics
Nanjing University, China
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Re: [gmx-users] Option -shuffle, -sort, -np missing in grompp in version 4.0?

2008-10-11 Thread Martin Höfling
Am Samstag, 11. Oktober 2008 schrieb Lee Soin:

 The command grompp used to have options -shuffle, -sort and -np, but it
 seems that they appear no more with version 4.0?

These options were used for particle decomposition in the tpr file. Gromacs 4 
default method is domain decomposition, but as far as I remember, PD is still  
optional. The options can be set during run-time so that a tpr input file 
itself is independent of the parallel setup during runtime (the output may 
depend upon the runtime environement). Thus you should find all options in 
mdrun. The -np switch isn't required anymore (for mpi).

Please correct me if I'm wrong...

Best
Martin
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Re: [gmx-users] Option -shuffle, -sort, -np missing in grompp in version 4.0?

2008-10-11 Thread David van der Spoel

Martin Höfling wrote:

Am Samstag, 11. Oktober 2008 schrieb Lee Soin:


The command grompp used to have options -shuffle, -sort and -np, but it
seems that they appear no more with version 4.0?


These options were used for particle decomposition in the tpr file. Gromacs 4 
default method is domain decomposition, but as far as I remember, PD is still  
optional. The options can be set during run-time so that a tpr input file 
itself is independent of the parallel setup during runtime (the output may 
depend upon the runtime environement). Thus you should find all options in 
mdrun. The -np switch isn't required anymore (for mpi).


Please correct me if I'm wrong...


These options have been removed indeed. Domain decomposition is much 
more efficient than particle decomposition. Therefore PD is useful only 
in special cases.



--
David van der Spoel, Ph.D., Professor of Biology
Molec. Biophys. group, Dept. of Cell  Molec. Biol., Uppsala University.
Box 596, 75124 Uppsala, Sweden. Phone:  +46184714205. Fax: +4618511755.
[EMAIL PROTECTED]   [EMAIL PROTECTED]   http://folding.bmc.uu.se
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