Zarr V3 Sharding Support

Open james-willis opened this issue 2 weeks ago • 2 comments

Feature description

I want to be able to read and write sharded Zarr v3 files with GDAL. Being able to write shards is critical when using smaller chunks as AWS s3 doesn't handle the large number of objects well.

This is the prior PR that added Zarr V3 support: https://github.com/OSGeo/gdal/pull/11787/

Additional context

No response

Dec 10 '25 00:12 james-willis

I want to be able to read and write sharded Zarr v3 files with GDAL.

Normally, I should have funding to add read support for reading sharded Zarr within a few weeks. Write support out of the scope of this funding source.

Dec 10 '25 00:12 rouault

For my use case I am much more interested in reading that writing so that is good news.

Dec 10 '25 00:12 james-willis