24th March, 2021

Attendees: Josh Moore, Matthias Bussonnier, Ryan Williams, Hailey Johnson, Jackson Brown, John Kirkham, Martin Durant, Gregory Lee, Ryan Abernathey

• Martin / dask summit (May). Leading dask io focused workshop. Good to have Zarr use cases. Why is dask & zarr a good thing. Good to present V3 progress.

  • https://summit.dask.org/present/

• Greg / zarr_implementations

  • V3 spec in progress, waiting for update from Alistar

  • Maybe (extremely rough) timeline ~3 months?

  • Imaging: Josh + Jackson + OME Community large testing after v3

    likely

  • Big view: for implementations? No, just testing

• Martin / Codecs

  • New one for shuffle. Doesn’t get a ton of love.

  • Windows tests were turned on!

  • John: zfpy support. (Lossy - possibly

  • Martin: imagecodecs does some of this.

  • Josh: invite Gohlke for imaging specific?

  • Martin: interested due to the reference offsets

  • Josh: had started trying to make numcodecs Pure Python

    (274)

    • John: shuffle work makes that harder
    • Martin: not exposed in the Python wrapper
    • John: still makes sense to try to.

  • Ryan: but others won’t be able to open the data.

  • Josh: dangerous for other languages (see zarr_implementions)

  • Martin: write in rust.

  • Jackson:

    https://github.com/pyca/cryptography/issues/5771

  • Ryan: tileDB codecs? Martin: can we just call those?

  • https://github.com/TileDB-Inc/TileDB/tree/dev/cmake/Modules

• Ryan / xarray multiscale

  • https://github.com/pydata/xarray/issues/4118

  • Ryan: hard to find the people. Needs a champion.

  • Josh: will minimally reference it.

  • Jackson: happy to contribute since it’s the backend for

    aicsimageio

• Matthias / v3 spec

  • Just a matter of time to rebase.

  • will synchronize with Gregory. (GL: good to meet, one on one)

  • MB: main difficulty was getting support for v2 and v3 at the

    same time.

• Hailey / zarr-java

  • Will support v2 & v3

  • working on v3 now.

  • Plan is to have something in 4 weeks.

• EOSS 4

  • John: keeping other projects funded

  • Matthias: who has access to numfocus slack?

  • Sparse/Awkward arrays?

• EOSS 1

  • Ryan: getting contract set up correctly. (issue of name)