Versioned HDF5 Change Log

1.2.6 (2021-04-20)

Minor Changes

• Fix a bug where chunks could be deleted from a dataset.

• Workaround an upstream h5py bug in the tests.

1.2.5 (2021-04-15)

Minor Changes

• Fix a bug where attrs could be deleted from a dataset.

1.2.4 (2021-04-08)

Major Changes

• Many improvements to performance throughout the library, particularly for datasets with many chunks, and for looking up versions by timestamp. This also sets up potential future performance improvements by automatically converting sparse staged datasets to fully in-memory.

• Add some additional benchmarks to the benchmark suite.

1.2.3 (2021-02-25)

Minor Changes

• Fix the length of str dtype not being maintained from the fillvalue.

1.2.2 (2021-02-04)

Minor Changes

• Many improvements to performance throughout the library.

• Added a benchmarking suite using airspeed velocity. Graphs of the benchmarks can be viewed at https://deshaw.github.io/versioned-hdf5/benchmarks/.

• Versioned HDF5 now depends on ndindex version 1.5.1 or greater.

1.2.1 (2020-12-30)

Minor Changes

• Python 3.6 support has been dropped. The lowest version of Python now supported is 3.7.

• Fix creating a completely empty sparse dataset

• Use ndindex.ChunkSize internally. This is the beginning of an overhaul that improves the performance of many operations. ndindex 1.5 or newer is now required.

1.2 (2020-11-17)

Major Changes

• Add support for sparse datasets (data=None).

• Store the chunks on an attribute of the dataset.

• versioned-hdf5 is currently pinned to h5py<3. h5py 3 support will be added in a future version.

• VersionedHDF5File[timestamp] now returns the closest version before timestamp if there is no version at timestamp.

1.1 (2020-09-15)

Major Changes

• Added support for shape-0 datasets.

• Fix a memory leak where in-memory datasets would not be garbage collected.

• Added support for empty datasets (size 0).

• Make sure versioned data is read-only after closing and reopening the file.

• Allow deleting groups and datasets between versions. Note that currently dataset metadata cannot change between versions, even if they are deleted in between.

Minor Changes

• Most tests now use a temporary directory instead of writing a file in the current directory.

• Fix logic for handling trailing slashes with in.

• Automatically create intermediate groups when creating a dataset.

• Make indices that should give a scalar object do so instead of giving a shape () array.

1.0 (2020-08-03)

Major Changes

• First release of Versioned-HDF5.