Re: [gmx-users] At what point is the random seed generated?

2014-01-29 Thread Szilárd Páll
On Wed, Jan 29, 2014 at 4:46 AM, Trayder Thomas wrote: > Curses! Kinda seemed intuitive that way. I assume the philosophy being > worked towards is that every unique run should have a unique .tpr file that > it is reproducible from? > > Curiously, I ran and checked a first batch on a different clu

Re: [gmx-users] At what point is the random seed generated?

2014-01-29 Thread Mark Abraham
On Jan 29, 2014 4:59 AM, "Trayder Thomas" wrote: > > Curses! Kinda seemed intuitive that way. I assume the philosophy being > worked towards is that every unique run should have a unique .tpr file that > it is reproducible from? It has that effect, which is very useful for debugging. I think of t

Re: [gmx-users] At what point is the random seed generated?

2014-01-28 Thread Trayder Thomas
Curses! Kinda seemed intuitive that way. I assume the philosophy being worked towards is that every unique run should have a unique .tpr file that it is reproducible from? Curiously, I ran and checked a first batch on a different cluster and the simulations rapidly diverged (even between simulatio

Re: [gmx-users] At what point is the random seed generated?

2014-01-28 Thread Mark Abraham
Indeed. grompp does report the seed it uses to stderr. Mark On Tue, Jan 28, 2014 at 8:51 AM, David van der Spoel wrote: > On 2014-01-28 08:37, Trayder Thomas wrote: > >> Hi, >> When using 'gen-seed = -1' at what point is the random seed assigned? >> >> e.g. Does it use the process ID of grompp

Re: [gmx-users] At what point is the random seed generated?

2014-01-27 Thread David van der Spoel
On 2014-01-28 08:37, Trayder Thomas wrote: Hi, When using 'gen-seed = -1' at what point is the random seed assigned? e.g. Does it use the process ID of grompp and embed the seed number in the tpr file, or does it use the process ID of mdrun? I ask because I have 50 identical simulations started

[gmx-users] At what point is the random seed generated?

2014-01-27 Thread Trayder Thomas
Hi, When using 'gen-seed = -1' at what point is the random seed assigned? e.g. Does it use the process ID of grompp and embed the seed number in the tpr file, or does it use the process ID of mdrun? I ask because I have 50 identical simulations started from the same tpr file :( Thanks, -Trayder