issue_comments: 1085589487

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https://github.com/pydata/xarray/issues/6433#issuecomment-1085589487 https://api.github.com/repos/pydata/xarray/issues/6433 1085589487 IC_kwDOAMm_X85AtMfv 14808389 2022-04-01T08:21:36Z 2022-04-01T09:19:14Z MEMBER

parallel=True will open (read the metadata) and preprocess the datasets in parallel using dask, which will happen in sequence with parallel=False. The difference is roughly: python if parallel: datasets, = dask.compute([dask.delayed(xr.open_dataset)(path, *args, **kwargs) for path in paths]) else: datasets = [xr.open_dataset(path, *args, **kwargs) for path in paths] So unlike load_dataset / the proposed load_mfdataset this will read metadata but not the actual data, and the result should be the same regardless of the parallel parameter (if it doesn't that would be a bug).

I agree that we could improve the parameter description, though.

 
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