[Users] Choose Self-defined Output Results Directory

[Haas, Roland]

Hello Steve,

> As a newer to Einstein Toolkit, I have successfully finished and
> executed the example file in the server following the link:
> https://github.com/nds-org/jupyter-et/blob/master/CactusTutorial.ipynb.
> But I have a question about deciding the simulation output
> directory，how can l give the self-defined output directory for
> storing the simulation results. Is there any files contents or
> commands inside ET that could define the output directory by myself,
> or any documentations clarifying how the Einstein Toolkit decide the
> IO directory?
> 
> Maybe it is a simple question, but I really don’t want to mess the
> common folders up too much, since I need to work out some simulations
> about NR in the group’s server.
Cactus thorns take the output directory for their output from the
parameter

IO::out_dir

(an alternative name is IOUtil::out_dir)

in the parameter (*.par) file. Some thorns eg CarpetIOHDF5 let you
specify that for their output you would like a different directory,
however they default to IO::out_dir. Eg

CarpetIOHDF5::out3d_dir

This is described in the documentation of the IOUtil thorn (which
provides the IO options):

https://einsteintoolkit.org/thornguide/CactusBase/IOUtil/documentation.html

and in CarpetIOHDF5 / CarpetIOASCII etc:

https://einsteintoolkit.org/thornguide/Carpet/CarpetIOHDF5/documentation.html
https://einsteintoolkit.org/thornguide/Carpet/CarpetIOASCII/documentation.html

though only the CarpetIOASCII thorn actually documents the option. For
CarpetIOHDF5 you have to consult its param.ccl file

https://bitbucket.org/eschnett/carpet/src/master/CarpetIOHDF5/param.ccl

Yours,
Roland

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