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Meeting Info

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Meeting ID: 840-709-413

Attendees

THG

Goals

  • Face-to-face intro
  • Continue developing list of candidate use cases/examples

Discussion items

  1. Face-to-face - done
  2. Application discussion:
    1. HAAC and other
      1. Rob: should spent time trying to find right solution; don't spent time to write in bad ways to get good performance. Need to look at Darshan and make assessment of HDF5 schema.
      2.  Mark: the same experience with Diablo. Are you using HDF5 effectively or HDF5 is doing something stupid?
      3. Venkat: HDF5/MPIIO layer doesn't passing good info for optimization
      4. R: Notion of different use cases can help ; is there some data that Darshan can capture and assess if the use of HDF5 is useful. Example of multiple datasets vs. aggregated by dimension. Mark: This should be known as a best practices for APIs and having Darshan as a flag. Mark used h5stat a lot to debug their problem.
    2. Mark: explained example of Diablo; we will have a white paper. Diablo can be one of those examples.
    3. Venkat: suggest modifications to h5stat - one have to knwo what to look for. Newbie mode? Have h5py tool to enhance h5stat output. Provide suggestions.
    4. One should be able to discriminate good/bad schema  by looking at the resulting file.
    5. HDF5 call capturing was integrated with extended Darshan logs.
    6. Mark: Github is so easy to get functional Website, may be the right thing will be have all working examples there?
    7. h5dump to use dot format to see directory content to see quick layout of the file. Can be used in the static document and Website. Programmatically generate the figures.
    8. Mark: How Conduit infrastructure primitive uses of HDF5. We want to describe why we want to do things like that.
    9. Anyone talking about HDF5 should mention ES. When it is technical consulting for applications mention ES.Ways how people can get help.
    10. Quincey: Website of TAB - open it! Candidates for THG Board -  former Labs employees, some of them are in industry.

Action items

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