Issues

• to_virtual_dataset eagerly loads loadable_variables

  zarr-developers/VirtualiZarr#1148 · Filter by author samlamont opened on Oct 26, 2026

• Proposal: a records codec, for periodic headers/footers and for selections within chunks

  zarr-developers/VirtualiZarr#1147 · Filter by author bendichter opened on Oct 22, 2026

• HDFParser fails on attributes that hold bytes that aren't valid UTF-8, or opaque data

  zarr-developers/VirtualiZarr#1143 · Filter by author bendichter opened on Oct 22, 2026

• HDFParser: read chunk index nodes ahead, in parallel, for remote files

  zarr-developers/VirtualiZarr#1140 · Filter by author bendichter opened on Oct 22, 2026

• HDFParser: one-element array attributes become scalars

  zarr-developers/VirtualiZarr#1139 · Filter by author bendichter opened on Oct 21, 2026

• Refactor _dataset_chunk_manifest in the HDF5 parser for readability, reliability, and performance

  bugperformance
  zarr-developers/VirtualiZarr#1132 · Filter by author maxrjones opened on Oct 14, 2026
  6

• HDFParser: object references and links

  enhancementHDF parser
  zarr-developers/VirtualiZarr#1124 · Filter by author bendichter opened on Oct 13, 2026
  2

• Parse MATLAB .mat files

  enhancementreferences generation
  zarr-developers/VirtualiZarr#1122 · Filter by author TomNicholas opened on Oct 12, 2026
  4

• Chunk index arrays: storing large manifests as Zarr arrays

  zarr-developers/VirtualiZarr#1119 · Filter by author bendichter opened on Oct 5, 2026

• Rewrite HDF5 parser in rust?

  dependenciesHDF parserperformancereferences generation
  zarr-developers/VirtualiZarr#1112 · Filter by author TomNicholas opened on Sep 28, 2026
  2

• Concatenate arrays with padded final chunks

  enhancementinternalsreferences generationzarr-pythonzarr-specs
  zarr-developers/VirtualiZarr#1111 · Filter by author TomNicholas opened on Sep 28, 2026

• HDFParser: read variable-length strings and object references at parse time instead of failing

  enhancementHDF parser
  zarr-developers/VirtualiZarr#1104 · Filter by author ianhi opened on Sep 22, 2026
  5

• last_updated_at should record parse-time or last-modified-time, not write-time

  bugIcechunk 🧊internalsobstorereferences generation
  zarr-developers/VirtualiZarr#1100 · Filter by author maxrjones opened on Sep 17, 2026
  2

• Remove Kerchunk from dependencies where possible

  dependenciesKerchunktesting
  zarr-developers/VirtualiZarr#1099 · Filter by author TomNicholas opened on Sep 16, 2026

• Support GRIB edition 0 / Météo-France FA files

  enhancementhelp wantedreferences generation
  zarr-developers/VirtualiZarr#1093 · Filter by author TomNicholas opened on Aug 31, 2026

• Make obstore optional

  zarr-developers/VirtualiZarr#1092 · Filter by author davidbrochart opened on Aug 28, 2026
  22

• Dangling pixel concatenation (variable-length chunks)

  usage example
  zarr-developers/VirtualiZarr#1078 · Filter by author jakenotjay opened on Aug 6, 2026
  1

• test_numpy_arrays_to_inlined_kerchunk_refs intermittently deadlocks in CI (kerchunk -> zarr sync under h5py's phil lock)

  zarr-developers/VirtualiZarr#1072 · Filter by author TomNicholas opened on Aug 5, 2026

• Virtualising an AODN/IMOS satellite SST archive (follow-up from #218)

  usage example
  zarr-developers/VirtualiZarr#1059 · Filter by author utas-amberbian opened on Jul 29, 2026
  2

• HDFParser: drop_variables is not propagated into subgroup recursion

  bugHDF parser
  zarr-developers/VirtualiZarr#1057 · Filter by author aladinor opened on Jul 28, 2026
  1

• ZarrParser fails on v2 vlen-utf8 string arrays with no explicit fill_value ('ambiguous object dtype')

  zarr-developers/VirtualiZarr#1053 · Filter by author TomNicholas opened on Jul 24, 2026

• xr.concat of virtual datasets silently drops mismatched CF encoding (scale_factor, add_offset, _FillValue)

  bugCF conventionsinternals
  zarr-developers/VirtualiZarr#1004 · Filter by author TomNicholas opened on May 26, 2026
  3

• FillValue decoding unexpected fill_value: null (on version 2.6.1)

  fill-sentinel-values
  zarr-developers/VirtualiZarr#989 · Filter by author dwest77a opened on May 5, 2026
  2

• Add example of Icechunk HTTPS virtual zarr, with caveat about auth

  documentationIcechunk 🧊
  zarr-developers/VirtualiZarr#978 · Filter by author maxrjones opened on Apr 23, 2026
  2

• Feature: Squeeze singleton dimensions in HDFParser

  HDF parser
  zarr-developers/VirtualiZarr#971 · Filter by author maxrjones opened on Apr 15, 2026