schnetter at cct.lsu.edu
Wed Feb 5 11:39:44 CST 2014
On Feb 5, 2014, at 12:16 , Vassilios Mewes <vassilios.mewes at uv.es> wrote:
> On Wed, Feb 5, 2014 at 6:02 PM, Ian Hinder <ian.hinder at aei.mpg.de> wrote:
> A "simulation", as far as simfactory is concerned, is a directory, which might be in /scratch/username/simulations. This usually corresponds to a single parameter file, and is logically "one cactus run". However, because jobs on clusters usually are limited to 24 hours, you need multiple jobs to form a longer simulation. SimFactory calls these different segments of the simulation "restarts", as the second one is restarted from the first, etc. The restarts correspond to directories output-NNNN in the simulation directory. Each new Cactus job in the simulation is run inside this output-NNNN directory. The parameter file usually specifies the name of the directory to put data into. Some users use '$parfile' which names the output directory after the parameter file.
> I usually name the simulation after the parameter file, and output the data into a directory also named after the parameter file, so my data would go in
> for a simulation called bbh, and an output file called phi.x.asc.
> Does this make things clearer?
> yes, thanks for the explanation!
> So in that case, you would set
> IO::out_dir = bbh
> IO::checkpoint_dir = bbh
> IO::recover_dir = bbh ??
Yes. Actually, you can write
IO::out_dir = $parfile
instead, so that you don't need to change these lines when you change the file name.
> And another question about the restarts of the entire simulation: Do I need to use the TerminationTrigger thorn for that and set the walltime I have on the cluster (minus some time to do the checkpointing before the termination)
That is one way. Actually, you can set TerminationTrigger::on_remaining_walltime = 20 to trigger termination when you have 20 minutes left. Simfactory will automatically fill in the correct value for TerminationTrigger::max_walltime if you set this parameter (to any value) in your parameter file.
> sorry for all the stupid questions, but this is the first time I will actually have to use the simfactory!
I hope it simplifies things!
Erik Schnetter <schnetter at cct.lsu.edu>
My email is as private as my paper mail. I therefore support encrypting
and signing email messages. Get my PGP key from http://pgp.mit.edu/.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 203 bytes
Desc: Message signed with OpenPGP using GPGMail
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20140205/89ee8de7/attachment.bin
More information about the Users