Re: Parallel Monte Carlo with FLUKA

From: Giuseppe Battistoni (
Date: Thu May 05 2005 - 09:13:28 CEST

  • Next message: Alfredo Ferrari: "Re: Parallel Monte Carlo with FLUKA"

    Yes! Now it works and this mechanism is actually already in use
    by many of us.
    There is an alternative, that is to prepare a set of different random
    seeds (analogous to the random.dat file that you have in the $FLUPRO
    directory) to start jobs on different machines.
    This would avoid to loose some time in job initialization,
    but sometimes people get confused in doing this, therefore
    I would say that the use of different WHAT(2) values
    in RANDOMIZE command is a less error-prone procedure.


    On Wed, 4 May 2005, LEE, KERRY T. (JSC-SF) (UHCL) wrote:

    > Date: Wed, 4 May 2005 15:23:52 -0500
    > From: "LEE, KERRY T. (JSC-SF) (UHCL)" <>
    > To: "''" <>
    > Subject: Parallel Monte Carlo with FLUKA
    > Hi,
    > I would like to run different FLUKA runs on multiple processors/machines,
    > but want to avoid the overlapping of random seed sequences. I saw the
    > following in the fluka-discuss archive.
    > Alfredo responded to this message saying that this mechanism was not in
    > place yet but would be there in the next release. Since this was almost 3
    > years ago I assume this mechanism exists now in the April 2004 release, is
    > that correct?
    > If I understand what Alberto said in his mail, I should be able to put in
    > any number less than 9.E8 in what(2) of RANDOMIZE and not have to worry
    > about repeating random sequences for different runs as long as I use
    > different values in what(2) of RANDOMIZE. Is that correct?
    > Thanks
    > Kerry
    > _________________________________

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