2022-7-19 Meeting notes

Approve 2021/3/29 minutes.

@Scot Breitenfeld ​

Approved

high-level editing tools for the documentation page

@Marc Poinot @Christopher Rumsey ​

Help needed to divide the remaining tasks:

https://github.com/CGNS/cgns.github.io/projects/1

The documentation goes into the source using Doxygen. This work uses the “Doxygen” branch. Examples are given for cg_open and cg_version. The aliases used for repeated variable descriptions are in src/Doxygen/Doxygen.config. We need volunteers to help with translating the remaining APIs to Doxygen.

• A link to the new website is provided on the main cgns web page: https://cgns.github.io/cgns-modern.github.io/index.html

• All the MLL APIs have Doxygen entries, the cgio APIs need to be done next.

• An automatic generation of the website through GitHub action is done.

Still in progress.

Converting CGNSTalk archive to Github Discussion Posts

@Scot Breitenfeld

Started converting the CGNSTalk archive to GitHub discussion posts.

Still in progress, the plan is to have it finished by the next meeting.

Discussion Topic

@ZJ Wang

Short discussion on past AMR CPEX (0008) and whether AMR should be revisited as a feature supported CGNS. Some groups may be already using CGNS with AMR, but not known for certain. The need for AMR support in CGNS is unknown.

@Vicky Moschou @Tobias Leicht @ZJ Wang to discuss progressing CPEX 0008.

Status update on Accepted CPEX #0045

CGNS-182: CPEX 0045: Polynomial Data and Curved Grid ElementsIn Progress

@Koen Hillewaert

The branch CPEX45_high_order has not been updated since Feb 25, 2020. An update from @Koen Hillewaert on the status is needed.

@Koen Hillewaert will start working on it soon, and @Tobias Leicht has offered to help when, or if needed.

Discussion Topic

@Mickael PHILIT

Proposal to have Monitoring numerical probes description to the standard. Some groups may already use CGNS to do that, but there is a need to have a shared approach.

CGNS-272: Add support for Monitoring probes in CGNSTo Do

Some feedback received. Did not have time to improve the proposal.

Will take feed back from meeting and present an updated CPEX at the next meeting.

Status update on Accepted CPEX #0047 Proposed Data integration Points

@Mickael PHILIT

Working on the new website before creating a new development branch to prevent duplicating efforts.

Started prototyping with python and C and will push a branch on GitHub in the upcoming weeks. (The “C” branch is a slow work in progress)

Is now in a branch on GitHub.

Status of Future CPEX 0046

CGNS-183: CPEX 0046: Particle DataTo Do

@Thomas Hauser ​

There is no one available to move forward with the CPEX. @Scot Breitenfeld will remove it from the discussion topics.

NO UPDATES

To be removed from the meeting notes.

Status of Future CPEX 0044

CGNS-181: CPEX 0044: Encoding sets of functions in generic variablesTo Do

@Koen Hillewaert

The current focus is on finishing and implementing CPEX 45.

Tabling CPEX 0044 for now.

NO UPDATES ON HOLD

To be removed from the meeting notes.

prioritization, review and attribution of JIRA bugs/issues

@Tony Garratt @David Gutzwiller ​

Next release 4.4.0, Kanban:

https://cgnsorg.atlassian.net/jira/software/c/projects/CGNS/boards/4

General Kanban Board:

https://cgnsorg.atlassian.net/secure/RapidBoard.jspa?rapidView=3&projectKey=CGNS&selectedIssue=CGNS-190

ISSUE CARRIED OVER:

Platform proposals
Windows is under-tested. Suggest Test C and Fortran serial and parallel on Windows 10 x64 as a bare minimum

Do we test both 32bit (legacy) and 64bit API? It's a minor point, but it would a good idea to add 32bit to at least one Linux and Windows

NEW (June 2021). We need to add Intel OneAPI compilers to the list of supported compilers (note: OneAPI C/C++ compiler is very different to existing legacy one)

Bug list: CGNS-176: Openmpi issues for large meshes failsIn Progress

A priority of bugs to fix in next release

#1 CGNS-135: Windows fails VS17, large files > 2GBTo Do

​Crucial to Ansys. Although most HPC is Linux, project set-up often was done on Windows and import/export/sharing of mesh/solution done on Windows, while most runs performed on Linux clusters

• important to have parallel working

#4 CGNS-166: Keep CGNS file compatible with HDF5-1.8To Do

#5 CGNS-55: Add new fortran and C examples to CMakeTo Do

#6

CGNS-38: 64bit support should be determined from configureTo Do

CGNS-162: Remove the use of configure.batTo Do

@Scot Breitenfeld is working on updating the Multi-dataset APIs in CGNS to use the new array-based API and is testing CGNS with the new HDF5 subfiling feature.

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