issues: 803068773

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
803068773 MDExOlB1bGxSZXF1ZXN0NTY5MDU5MTEz 4879 Cache files for different CachingFileManager objects separately 1217238 closed 0     10 2021-02-07T21:48:06Z 2022-10-18T16:40:41Z 2022-10-18T16:40:40Z MEMBER   0 pydata/xarray/pulls/4879

This means that explicitly opening a file multiple times with open_dataset (e.g., after modifying it on disk) now reopens the file from scratch, rather than reusing a cached version.

If users want to reuse the cached file, they can reuse the same xarray object. We don't need this for handling many files in Dask (the original motivation for caching), because in those cases only a single CachingFileManager is created.

I think this should some long-standing usability issues: #4240, #4862

Conveniently, this also obviates the need for some messy reference counting logic.

  • [x] Closes #4240, #4862
  • [x] Tests added
  • [x] Passes pre-commit run --all-files
  • [x] User visible changes (including notable bug fixes) are documented in whats-new.rst
 
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