|Message: random number generation||Not Logged In (login)|
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I'm trying to simulate a large number of events, something like several billion. I've been doing this by running multiple jobs in parallel, using the ranecu engine and setting a unique initial seed for each job with HepRandom::setTheSeed(seed).
But I've just realized that this doesn't work so well. One problem is that the ranecu engine uses a table of initial seeds of length 215, and HepRandom::setTheSeed(seed) just picks an entry in this table. So it's not possible to have more than 215 independent jobs running in parallel - I had been attempting to run 2000 jobs.
Another problem seems to be that random numbers are repeating even within the first 215 jobs.
Is there another engine I can use to get more independent random numbers? Are there any examples illustrating the use of other engines? Thanks,
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