[Cosmoparticle-wg] ET "Cosmology and particles" working group call

[Clough, Katy]

Hi everyone

Thanks for the comments. I will indeed just be giving a brief overview of GRChombo, but I’d be very happy to provoke a discussion of what people feel are the key requirements/recommendations for public codes. GRChombo is still relatively new and certainly has a lot to learn from an established code like the ET.

Looking forward to the discussion!

Katy

--------------------------------------------
Dr. Katy Clough
Postdoctoral Research Associate
Institut für Astrophysik
Georg-August-Universität
Göttingen, Germany
--------------------------------------------

On 16 Apr 2018, at 22:37, Erik Schnetter <schnetter at gmail.com<mailto:schnetter at gmail.com>> wrote:

Boud

On a theoretical level you are correct.

On a practical level, I find the most important things for
reproducible computational science are:
- use a version control system
- produce all simulations for a paper with one particular, documented
version of the code
- store all parameter/input files in the paper repository

And most of all:
- have a working tutorial with simple examples that helps people get
started with the code

I'm not expecting a tutorial from Katy (I'm expecting an overview),
but if you want to build a community, you might want to think about
offering such a tutorial, e.g. via videoconferencing, once you have a
few interested people.

-erik



On Mon, Apr 16, 2018 at 4:46 PM, Boud Roukema <boud at astro.uni.torun.pl<mailto:boud at astro.uni.torun.pl>> wrote:
hi Helvi, all,

On Mon, 16 Apr 2018, helvi witek wrote:

Katy Clough kindly agreed to give us an introduction to GRChombo (
http://www.grchombo.org/), their new, publicly available numerical
relativity code.

GRChombo is *not* just publicly available; it is free software in the
formal sense of "free software" (i.e. free-licensed software -
https://en.wikipedia.org/wiki/free_software), under the BSD 3-clause
licence:

https://github.com/GRChombo/GRChombo/blob/master/LICENSE

For a code to be publicly available is not very useful in itself,
since that includes non-free codes, for which it is illegal to modify
the code, redistribute it, and/or redistribute modified versions.

What is critical for a scientific community like ours is to be able to
correct bugs in the code, add features, have other people correct bugs
in turn, and freely redistribute corrected versions, while giving
proper credit to who did what and including proper revision/history
control. For software to be publicly available is insufficient to
support this community process; in contrast, being free-licensed
software - such as GRChombo - guarantees the right to free development
by the community.

Cheers
Boud
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--
Erik Schnetter <schnetter at gmail.com<mailto:schnetter at gmail.com>>
http://www.perimeterinstitute.ca/personal/eschnetter/
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