pull_requests: 227443527

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id node_id number state locked title user body created_at updated_at closed_at merged_at merge_commit_sha assignee milestone draft head base author_association auto_merge repo url merged_by
227443527 MDExOlB1bGxSZXF1ZXN0MjI3NDQzNTI3 2532 closed 0 [WIP] Fix problem with wrong chunksizes when using rolling_window on dask.array 102827 - [ ] Closes #2514 - [ ] Closes #2531 - [ ] Tests added (for all bug fixes or enhancements) - [ ] Fully documented, including `whats-new.rst` for all changes ## Short summary The two rolling-window functions for `dask.array` * [dask_rolling_wrapper](https://github.com/pydata/xarray/blob/b622c5e7da928524ef949d9e389f6c7f38644494/xarray/core/dask_array_ops.py#L23) * [rolling_window](https://github.com/pydata/xarray/blob/b622c5e7da928524ef949d9e389f6c7f38644494/xarray/core/dask_array_ops.py#L43) will be fixed to preserve `dask.array` chunksizes. ## Long summary The specific initial problem with chunksizes and `interpolate_na()` in #2514 is caused by the padding done in https://github.com/pydata/xarray/blob/5940100761478604080523ebb1291ecff90e779e/xarray/core/dask_array_ops.py#L74-L85 which adds a small array with a small chunk to the initial array. There is another related problem where `DataArray.rolling()` changes the size and distribution of `dask.array` chunks which stems from this code https://github.com/pydata/xarray/blob/b622c5e7da928524ef949d9e389f6c7f38644494/xarray/core/dask_array_ops.py#L23 For some (historic) reason there are these two rolling-window functions for `dask`. Both need to be fixed to preserve chunksize of a `dask.array` in all cases. 2018-10-31T21:12:03Z 2021-03-26T19:50:50Z 2021-03-26T19:50:50Z   efc36181613b0fb29d2f67b2ef40f1e463fd133f     0 8a4e5904ccede22565a51dc3775b99d713df6259 7bf9df9d75c40bcbf2dd28c47204529a76561a3f CONTRIBUTOR   13221727 https://github.com/pydata/xarray/pull/2532  

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