# Notes for 2022-03-03 meeting

* date & time: Thu 3 Mar 2022 - 14:00 CET (13:00 UTC)
* (every first Thursday of the month)
* venue: *(online, see mail for meeting link, or ask in Slack)*
* agenda:
- Quick introduction by new people
- EESSI-related meetings in last month
- Progress update per EESSI layer (+ GitHub App, MPItrampoline)
- Monitoring EESSI infrastructure
- 2021.12 version of pilot repository
- AWS/Azure sponsorship update
- Update on EESSI paper
- S4 project proposal for NeIC call
- Upcoming events
- Q&A

### Slides

* available at https://github.com/EESSI/meetings/blob/main/meetings/EESSI_meeting_20220303.pdf

### Meeting notes

*(by Kenneth)*

#### Quick introduction by new people

* Elisabeth Ortega (HPCNow!)

#### EESSI-related meetings in last month

- EESSI community meeting in Amsterdam 15-16 Sept?
- co-located with CernVM workshop (12-14 Sept)

- plan to set up proof-of-concept support for GPUs in EESSI pilot 2021.12
- add script that should be run to EESSI repo (TODO Alan)
- provide basic instructions on what to do
- add cuda-samples installation to facilitate testing (WIP Kenneth)

#### Progress update per EESSI layer

##### Filesystem layer

*(see slides)*

* WRF input data (cfr. https://github.com/EESSI/software-layer/pull/170) is relatively small (<1GB)
* temporary solution could be to add it to EESSI pilot repo
* benefit is limited for just WRF
* proper setup would require setting up a separate repo/external web server, etc. (see https://cvmfs.readthedocs.io/en/stable/cpt-large-scale.html)
* use S3 bucket as storage backend?
* this is mostly about *easy* access, not fast access
* learn from CERN repositories

##### Compatibility layer

*(see slides)*

* ...

##### Software layer

*(see slides)*

* Terje: plans to extend PyGHee functionality to easily post comments back into PR that triggered event?

* experiments with MPItrampoline
* some software (Score-P, mpi4py, CP2K) needed patching, mostly because they don't fully follow the MPI standard
* most of those patches can be pushed upstream
* CP2K patch is more complex, may be good to get feedback there from CP2K developers
* MPItrampoline has only been tested on top of OpenMPI for now
* enabling runtime switching to different MPI backends (MPICH, MVAPICH2) should be as simple as providing an MPIwrapper for these
* being able to leverage a vendor MPI is more difficult (w.r.t. linker being used, location of files, etc.)

##### Monitoring EESSI infrastructure

* http://status.eessi-infra.org (not HTTPS yet)

##### 2021.12 version of pilot repository

*(see slides)*

#### AWS/Azure sponsorship update

*(see slides)*

- separate EESSI data repository could be set up in Azure?
- CitC developer (Matt Williams) was given access to EESSI Azure credits for testing support for Azure in CitC that's being developed and contributed by Hugo (MS Azure)
- Should we also set up an EESSI login node in Azure?

#### Update on EESSI paper

- Already published o\/: https://onlinelibrary.wiley.com/doi/full/10.1002/spe.3075

#### S4 project proposal for NeIC call

- 2nd attempt to get funding for EESSI through NeIC

#### Upcoming events

- project proposal for BioHackathon Europe 2022
- in the scope of ELIXIR project
- suggested by Sebastian Moretti via EasyBuild Slack

#### Q&A

- ...