HDF Newsletter #127

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                             Newsletter #127
                              May 15, 2012

  - Release of HDF5-1.8.9

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Release of HDF5-1.8.9

The HDF5-1.8.9 release is now available. Many thanks to the users who
helped test this release.

The HDF5-1.8.9 software can be obtained from the following page:


This page can be accessed from The HDF Group Downloads page:


The HDF5-1.8.9 documentation is located in:


For information on HDF5, see the HDF5 home page:


HDF5-1.8.9 is a minor release, but contains several important new
features and bug fixes. Changes in this release include the following:

  - Committed datatypes can now be merged when copying objects, using
    the new flag H5O_COPY_MERGE_COMMITTED_DTYPE_FLAG. Several new
    API routines have been included in support of this feature.

  - A file in memory can now be accessed in the same way as a file on
    disk. New APIs were added to support this feature.

  - Many changes to the tools have been made, including the following:

    o The h5repack performance has been improved dramatically for large
      chunked datasets.

    o The -S (or --summary) option was added to h5stat to display a
      summary of the file space usage for a file.

    o A wildcard can now be used with h5dump to specify multiple files.

  - H5LTpath_valid was added to determine if a path is correct and a
    link resolves to a valid object.

  - The Fortran counterpart to H5Ocopy, h5ocopy_f, was added.

This release contains many other changes and bug fixes not listed
here. Please be sure to read the Release Notes for a comprehensive
list of new features and bug fixes:


For questions regarding these or other HDF issues, contact: