Hi Jason,
the statement in your first email is correct.
Not sure I completely understood your second email, but the combination of the results of different jobs is usually fast (few seconds to few minutes depending on the size of the scoring files).
As mentioned before, you need to combine the results from several jobs in order to calculate the averages and statistical uncertainties.
Please give also a look at these slides
https://indico.cern.ch/event/694979/contributions/2927109/
Hope this clarify your questions.
Best luigi
On 20 Aug 2019, at 19:58, TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>> wrote:
In addition to the previous email.
Therefore, when I run 1 million histories I am actually getting 4 million histories, in a shorter time after I combine them?
Jason
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From: TYRRELL, JASON
Sent: Tuesday, August 20, 2019 6:55:32 PM
To: Luigi Salvatore Esposito <luigi.salvatore.esposito_at_cern.ch<mailto:luigi.salvatore.esposito_at_cern.ch>>
Cc: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org> <fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>>
Subject: Re: [fluka-discuss]: Utilizing four cores
Ok great.
Can you correct me if I'm wrong please.
I have set my number of histories to 1 million and set spawn equal to 4. Therefore, each core is running 1 million histories, with an ETA of 1 hour and 30 mins. Each job is assigned a different random number seed with each job saved separately. Then, when the run is complete, I use the data window to combine each job into one?
Thanks again
Jason.
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From: Luigi Salvatore Esposito <luigi.salvatore.esposito_at_cern.ch<mailto:luigi.salvatore.esposito_at_cern.ch>>
Sent: Tuesday, August 20, 2019 6:14:55 PM
To: TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>>
Cc: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org> <fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>>
Subject: Re: [fluka-discuss]: Utilizing four cores
Yes!
You need to do combine all the jobs to compute the statistical uncertainty of you estimators.
Best, luigi
On 20 Aug 2019, at 19:02, TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>> wrote:
That's great thank Luigi. Will I also have to combine the 4 jobs at the end?
Regards,
Jason.
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From: Luigi Salvatore Esposito <luigi.salvatore.esposito_at_cern.ch<mailto:luigi.salvatore.esposito_at_cern.ch>>
Sent: Tuesday, August 20, 2019 5:04:09 PM
To: TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>>
Cc: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org> <fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>>
Subject: Re: [fluka-discuss]: Utilizing four cores
Dear Jason,
in the spawn column (next to the input you want to run) you can digit the number of desired spawn jobs.
When you start the run, the input number of jobs will run in parallel (in your case at most 4).
If you click on the Help icon in the Run view, the Flair manual will be opened and you can see a picture showing an example.
Hope this could help.
Cheers luigi
On 20 Aug 2019, at 17:54, TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>> wrote:
Hi Luigi,
I am using flair. I saw the spawn option in a thread but I didn't understand. How exactly would I do that? I am coming to the end of my project and it is quite a problem.
Thanks a lot,
Jason.
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From: Luigi Salvatore Esposito <luigi.salvatore.esposito_at_cern.ch<mailto:luigi.salvatore.esposito_at_cern.ch>>
Sent: Tuesday, August 20, 2019 4:51:17 PM
To: TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>>
Cc: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org> <fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>>
Subject: Re: [fluka-discuss]: Utilizing four cores
Dear Jason,
you can run more jobs in parallel.
For example, if you use Flair you can do it from the Run view and choose the number of spawned jobs.
Best luigi
On 20 Aug 2019, at 16:32, TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>> wrote:
Hello Everyone,
I am running FLUKA on a PC with four cores however, FLUKA is only using two of them. Can someone explain how I can utilize all four cores?
Thanks a lot,
Jason.
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Received on Wed Aug 21 2019 - 10:15:37 CEST