[Users] Meeting Minutes 2021-08-26

Thu Aug 26 10:48:04 CDT 2021

Present: Bill G, Helvi W, Steve B, Miguel G, Yosef Z, Roland H, Leonardo 
RW, Atul K,
Peter D, Zach E, Maria H, Gabriele B

Chair: Helvi W, Minutes: Bill G

* SPEC benchmark contribution 
[https://bitbucket.org/einsteintoolkit/tickets/issues/2470 task] [RH, SB]

Roland, no real updates, do need to send an extended description and ask 
if they
need more details.  Steve would like to know why they asked for this 
detailed
description.

https://www.spec.org/cpu2017/Docs/benchmarks/507.cactuBSSN_r.html

* next ET release manager [RH]

Next release is in November; recall feature freeze is about two weeks 
before release
and hard freeze a few days before.

https://docs.einsteintoolkit.org/et-docs/Release_Details
https://docs.einsteintoolkit.org/et-docs/Release_Process

Steve agreed to be the manager with help from Yosef.  Helvi, it is 
useful to have
more than one person to do this.  Steve, Roland left off the conditional 
that Steve
will do it if Roland does this "soon," need not be the next release after.

** New inclusions for next release

FLRWSolver/Cosmology by Hayley Macpherson and Helvi will review it.
Ticket #2549, 
https://bitbucket.org/einsteintoolkit/tickets/issues/2549/inlcude-flrwsolver-in-et 
.

Kuibit and possibly RePriMand for inclusion.  RePriMand has ticket #2551,
https://bitbucket.org/einsteintoolkit/tickets/issues/2551/include-reprimand-in-the-et 
.
RePriMand does have a thorn and an external library for it. Unlikely to 
build out of the
box...requires a couple of other packages/tools.  If it requires 
external libraries not
typically available on clusters, we cannot enable it by default. For 
example, Peter's 1D
Force is a model of a stand-alone version that is not built by default 
and uses SCons
for building.

Atul, wanted to volunteer for Kuibit review, and he is unable to review 
Kuibit this
semester.  Can do less intensive work for the release though. Yosef 
intends to try
to review Kuibit.  Review does not check for correctness, checks for 
running and
documentation.  Ticket #2438, 
https://bitbucket.org/einsteintoolkit/tickets/issues/2538/inclusion-of-kuibit 
.

Yosef, build systems question, can RePriMand run on all clusters.  
Wolfgang says it
is mostly Python and if you have some Pip version maybe can 
install/build that way.
Builds using Meson which uses Ninja and not Make.

Gabriele, how will Kuibit is to be included in the ET?  In the repo or 
installed by Pip?
Roland, could use it in GetComponents and that gives best exposure and 
lets different
branches be checked out.  Kuibit was reviewed in the Journal of Open 
Science
Software...there is a link in the ticket.
JOSS paper at https://joss.theoj.org/papers/10.21105/joss.03099 .

Roland, If the software is independently hosted, we ask for a branch 
label with the
ET name, and then if their Master branch for that software fails, we use 
the ET branch
of their software.

Helvi, has a code in the ET and has one branch for the ET and there is 
another branch
her group uses routinely.

Roland discusses a couple of options and how to get the dependencies for 
Kuibit, for
example.  Gabriele also uses Tags on the Branches that he can make very 
easily.
He likes distributing the repo because of all the examples. Helvi, maybe 
include
these links in the documentation.

** Gallery Examples

Helvi has two students that should do examples.

* Any Other Business

** Maria, would like documentation on thorns Multipole and 
QuasiLocalMeasures
and SphericalSurface used to extract the GWs.  Why/How do they depend on 
each
other and how to tune the parameters.  Helvi, Check the Readme for the 
thorn,
some information there.

Roland, WeylScal4 everyhwere in 3D space, and Multipole calculates the 
projection
and spin spherical harmonics.  QuasiLocalMeasures is separate, concerned 
with
calculations on horizons, like spin, etc, not concerned with waves but 
with horizons.
There are papers cited there, in the README.  An older thorn does the 
same thing.
Some documentation was started but does not go very far. 
SphericalSurface does
not do any analysis, it is a way to describe in the code star-shaped 
surface.
Horizon finder will store the shape in the spherical surface to do the 
isolated
horizon quantities.  Waveform extraction does not use the 
SphericalSurface at all.

** Helvi, there is a new monthly call for the NumRel community started 
by Nils
Fischer; the next call is 13th September.  The idea is to have speakers 
from
different code communities, next time SXS/Mitman and Meudon/Oertel are
presenting.  Structure is to describe the project, here is what we are 
working, and
here is where we have difficulties and ask if there are any ideas in the 
community.

https://github.com/sxs-collaboration/nr-community-call/wiki

* [https://www.einsteintoolkit.org/tools/unanswered.php unanswered 
question on mailing list]

Perl script is failing, in many ways.  It does not display unanswered 
entries on the
mailing list right now.  Roland is aware.

* 
[https://bitbucket.org/einsteintoolkit/tickets/issues?status=open&status=new&sort=-updated_on 
open tickets sorted by update time]

Helvi goes through the tickets.

#2553, CPPFLAGS and CXXFLAGS trouble when you use a non-g++ compiler, like
using the cuda compiler.  Roland has a work around.  Only affects Cuda.  
If doing Cuda this might affect you.

#2559, HDF5 library generates 2GB of files and we do not use them and 
causes
trouble in some user quotas.  Roland, this is cleanup.

#2558, link for Power incorrect, ticket is almost closed, need to wait 
one more
week and then will backport the fix.

#2538, inclusion of Kuibit, discussed above.

* 
[https://bitbucket.org/einsteintoolkit/tickets/issues?status=new&status=open&sort=-updated_on&q=Please%20review 
tickets ready for review]

Nothing new or discussed.

* Any Other Business

Next weeks chair and minute taker:

Yosef will chair.  Maria will take minutes.

-- 
==============================
William Gabella
Research Assistant Professor
Department of Physics and Astronomy
Nashville, TN USA
(o) 615-343-2713