Message: Advice in choosing and seeding the a random engine Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Question Advice in choosing and seeding the a random engine 

Forum: Run Management
Date: 05 Nov, 2010
From: <kram@kph.uni-mainz.de>

Dear Simulanten,

please forgive me if this is not the right place to ask or if this question has already been answerered somewhere else; it might be very common.

What I am looking for is some comparison between the random engines available with Geant, which is more detailed than the chapter in the manual.

Since my application runs on a computig farm, I'm especially interested in a information about the period of the generators and how to seed them correctly. At the moment, the Ranecu-engine with the job-index as a seed is used. But since the number of seeds is limited for this random engine, I am limited in the number of jobs I can run. To cut down the computing time for each individual job, it would require only minor changes to the application there were 24500 possible seeds.

The easiest might be to use the standard HepJamesRandom and seed it with s=0 ... 24499. Is this advisable?

Can you recommend any documentation to consult?

Thank you very much for your effort.

Dirk.

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Advice in choosing and seeding the a random engine   (Tom Roberts - 06 Nov, 2010)
(_ Ok: Re: Advice in choosing and seeding the a random engine   (kram@kph.uni-mainz.de - 11 Nov, 2010)
 Add Message Add Message
to: "Advice in choosing and seeding the a random engine"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]