On 10/05/2011 7:53 PM, SebastianWaltz wrote:
Hi Mark,

On 05/10/2011 11:34 AM, Mark Abraham wrote:
On 10/05/2011 5:36 PM, SebastianWaltz wrote:
Dear GROMACS users,

I wonder if it is not possible to use more than 1 core (according to the
manual) for each replica using GROMACS 4.0.x?

You can use more than one core per replica  from 4.0 onwards.

In the manual is written that the number of cores defined by the -np
option of mpirun has to be the same as the number of replicas.

What text makes you think this? I can't see any, but if there is, it should be fixed.

Mark
it is this sentence:

The number of cores (and the |-np| flag for mdrun <http://www.gromacs.org/Documentation/Gromacs_Utilities/mdrun> for GROMACS prior to version 4.0) must agree with the number of .tpr <http://www.gromacs.org/Documentation/File_Formats/Topology_%28.tpr%29_File> files (i.e., 10 for the above general example using |prefix_0.tpr| through |prefix_9.tpr|). Nomenclature for the input files is critical to getting mdrun <http://www.gromacs.org/Documentation/Gromacs_Utilities/mdrun> to work.

and the example below on this page

http://www.gromacs.org/Documentation/How-tos/REMD

That text is on the *webpage*, as distinct from the PDF *manual*. Unfortunately you led me to look in the wrong place...

I've updated the webpage at the above URL.

Mark
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