[Gretl-users] Re: random numbers in MPI
Am 19.07.2020 um 22:04 schrieb Allin Cottrell:
On Sun, 19 Jul 2020, Sven Schreiber wrote:
> What about the case where you want to have independent RNG
sequences
> across processes, but you want to be able to control them for
> replication purposes, from one run to the next? How to achieve that
> effect in gretl's MPI implementation?
set seed
<hansl>
print "starting MPI..."
mpi
set seed 88775531
Aha, that's of course very simple. But it feels kind of strange to set
just one seed to manage three (or N) independent processes. Do they
really stay "independent"? (Which of course is an imperfect concept for
deterministic algorithms anyway, but let's try to ignore that problem
for now.)
sorry for the vague question
thanks
sven