[gmx-developers] Third beta release of GROMACS 2020

Paul bauer paul.bauer.q at gmail.com
Tue Dec 3 15:57:10 CET 2019

Hello developers,

I just uploaded the third and final beta release of GROMACS 2020, with 
the fixes for the
issues found be us and you during the first and second beta now mostly 
fixed. The plan is still
to ship the new release at the beginning of the new year, so please 
continue to
help us dogfood things by building the code on your local machines and 
trying out your favorite
simulations - we can not test everything ourself here and appreciate 
your help in
identifying and fixing remaining issues in the code!

I know the version got shipped quite a lot later than I promised in the 
last mail,
so please accept my apologies for the delay.

Especially, we would like to have tests for:
The new GPU code paths under different simulation conditions
Testing of the density fitting code
Checks that the modular simulator performs as expected
Some user experience with the Python API

The release-2020 branch continues to be only for bug fixes, with all new
feature development to be on the master branch.

I'm planning to ship the release candidate in about two weeks in 
so that we have enough time for people to test both this beta and the 
final RC.
If you want a bug fix to be in before the release candidate,
please help organize to get the fix made and reviewed. The role of the
release manager is to ship code that's in good shape, not to shepherd every
known issue to be resolved before shipping.

As mentioned before, any bugs found in release-2019 should continue to be
targeted at this version, before we move it to essential fixes only 
after 2020 gets
released next year. At the same time we will retire the release-2018 
branch with
a final patch version. The release-2019 branch will stay open for about 
a year for
fixes that prevent wrong science, and will be closed around the time of 
Fixes in it will be appear in release-2020 branch via merges or by 
cherry-picking changes in the usual way.

Happy coding

Paul Bauer, PhD
GROMACS Release Manager
KTH Stockholm, SciLifeLab

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