Support MPI distributed arrays where some processes have no data#26
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When working with large arrays distributed across a fixed-size MPI communicator, it is sometimes necessary to handle the case where a sliced / reduced array results in no local data on some processes. These changes accomodate that situation by allowing construction of FlacArray instances where some processes have zero streams. Routines for I/O to HDF5 and Zarr are also updated for the case where some processes have no local data.
keskitalo
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Jun 30, 2026
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Seems uncontroversial. Thanks for adding support for empty local dataset.
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When working with large arrays distributed across a fixed-size MPI communicator, it is sometimes necessary to handle the case where a sliced / reduced array results in no local data on some processes. These changes accomodate that situation by allowing construction of FlacArray instances where some processes have zero streams. Routines for I/O to HDF5 and Zarr are also updated for the case where some processes have no local data.