Index of /pub/people/gene/pargeant4

	Name	Last modified	Size	Description
	Parent Directory		-
	OLD/	03-Mar-2002 03:45	-
	ParN02-7.0.tar.gz	09-Mar-2002 05:01	35K
	ParN02-8.0.tar.gz	02-Dec-2005 12:05	41K
	ParN02.tar.gz	02-Dec-2005 12:05	41K
	ParN04-7.0.tar.gz	09-Mar-2002 05:01	66K
	ParN04-8.0.tar.gz	02-Dec-2005 12:05	86K
	ParN04.tar.gz	02-Dec-2005 12:05	86K
	README.html	09-Mar-2002 05:15	5.0K
	geant4-and-grid-conf.pdf	12-Aug-2004 18:17	127K
	geant4-and-grid.pdf	12-Aug-2004 18:05	129K
	geant4-and-grid.ps	04-Mar-2002 18:33	204K

ParGeant4 README

This distribution implements event-level parallelism for Geant4 using the free TOP-C distribution. (TOP-C = Task Oriented Parallel C/C++)

You will find this as part of the Geant4 4.1 distribution. It is in examples/extended/parallel/ParN02 and .../ParN04 . These are example parallelizations of N02 and N04 are provided, along with information about how to similarly parallelize other applications.

Alternatively, you can download the source from the (ftp directory). Both ParN02.tar.gz and ParN04.tar.gz are available. These are example parallelizations that parallelize examples/novice/N02 and examples/novice/N04 of the Geant4 4.0 distribution. The files also contain information on how to write new parallel Geant4 applications or parallelize existing sequential Geant4 applications.

The design goals are:
1.  No modification of the Geant4 kernel libraries.
2.  Application sessions should be efficient and reproducible
     (independently of the number of slave processes and the
      order in which they are called by TOP-C)
3.  Setting deterministic random seeds on each slave
    [ This code assumes that each slave will initialize its random state
      based on either the event number or a random seed selected
      on the master.]

This assumes that you have already installed CLHEP, Geant4, and TOP-C
  TOP-C can be downloaded via its home page:
                          http://www.ccs.neu.edu/home/gene/topc.html

Other qualifications are:
1.  `topc-config' is already in your path.
2.  It has only been tested under Linux, although it should be
       portable to any other UNIX supported by Geant4.
3.  This should support histograms as long as AnalysisManager::Step() is
        is trivial.  However, I have not had the opportunity
        for careful testing.  Please write to gene@ccs.neu.edu if you
        are including histograms, and especially if you define
         AnalysisManager::Step().
4.  Currently, this distribution does not support:
      histograms, trajectory stores, n-tuples, track parallelism,
      interactive input commands (no macrofile)
    I plan to add those features according to demand.
       Probably:  a. allowing interactive input
                  b. track-level parallelism
                  c. other (trajectory store, PostponeOneEvent(), ...)

ParGeant4 has now been demonstrated to run over the Computational Grid using a new TOP-C communication layer, with support for the Grid, based on Ampic. There is a paper reporting on this in postscript.
G. Cooperman, H. Casanova, J. Hayes and T. Witzel, ``Using TOP-C and AMPIC to Port Large Parallel Applications to the Computational Grid'', Proc. of 2nd IEEC/ACM Interantional Symposium on Cluster Computing and the Grid (CCGrid), 2002, to appear

(This material is based in part upon work supported by the National Science Foundation under Grants No. 9732330 and 9872114. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.)