# Notes for 2025-11-06 meeting

* date & time: Thu 6 Nov 2025 - 14:00 CET (13:00 UTC)
* (every first Thursday of every other month (odd months))
* venue: *(online, see mail for meeting link, or ask in Slack)*
* Agenda:
- Quick introduction by new people
- Progress update per EESSI layer
- Update on EESSI production repository software.eessi.io
- Modulefile for initializing the EESSI stack
- Update on EESSI documentation + test suite + build-and-deploy bot
- AWS/Azure sponsorship update
- Upcoming/recent events
- Q&A

### Slides

* https://raw.githubusercontent.com/EESSI/meetings/main/meetings/EESSI_meeting_20251106.pdf

### Meeting notes

*(by Bob/Kenneth)*

#### Quick introduction by new people

- Renato Alves (EMBL)

#### Progress update per EESSI layer

##### Filesystem layer

*(see slides)*

- Kenneth: feature is being implemented in CernVM-FS to provide support for partially mirroring CernVM-FS repositories
- for example ignore `aarch64` parts of EESSI repository
- Richard: exporting EESSI through NFS for just 2 CPU architectures => already requires over 1TB
- compared to ~600GB for a full Stratum-1 mirror, thanks to compression & deduplication done by CernVM-FS

##### Compatibility layer

*(see slides)*

- revising strategy for symlinking NVIDIA GPU drivers, only relevant for EESSI version 2025.06 (not 2023.06)

##### Software layer

*(see slides)*

- Alan has been focusing on installing additional software in EESSI 2025.06 w.r.t. remote desktop environments
- docs should be updated to mention A64FX as supported CPU target
- and make it clear that no GPU installations will be provided for A64FX

#### software.eessi.io repository

*(see slides)*

- zen5 (AMD Turin) and Graviton 4 will probably be added to supported EESSI 2025.06 CPU targets
- 2025.06 module is still hidden
- (Alan) no easy way to search across EESSI versions
- may need to construct top-level spider cache "manually" for that

#### Make Spack aware of software installed in EESSI

*(see slides)*

- milestone of being able to build QuantumESPRESSO with with Spack using all dependencies coming from EESSI is probably worth a blog post?
- follow-up meeting with Todd Gamblin to figure out next steps, get feedback

#### Build-and-deploy bot

*(see slides)*

- also building for Zen5 is possible, but we would need to spin up a new build cluster in a different Slurm region
- we could use this as an opportunity to migrate current AWS build cluster to a new setup

#### EESSI documentation

*(see slides)*
- ...

#### EESSI test suite

*(see slides)*
- ...

#### AWS/Azure sponsored credits

*(see slides)*

- refresh of AWS credits for 2026 hopefully coming soon

#### Events

*(see slides)*

- Caspar will also be giving a presentation at the Dutch RSE Day event

#### Frequency of EESSI update meeting

- ...

#### Q&A

- (Davide) early status update on EESSI on Android