HDF Newsletter #148

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                             Newsletter #148
                              March 31, 2016

  - Release of HDF5-1.10.0

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Release of HDF5-1.10.0

We are very pleased to announce the release of HDF5-1.10.0.

Links to the HDF5 1.10.0 source code, documentation, and additional materials
can be found on the HDF5 web page at:


The HDF5 1.10.0 release can be obtained directly from:


User documentation for 1.10.0 can be accessed from:


This release contains many important new features and changes, including those
listed below. The features marked with * use new extensions to the HDF5 file

  o The Single-Writer / Multiple-Reader or SWMR feature enables users to read
    data while concurrently writing it. *

  o The virtual dataset (VDS) feature enables users to access data in a
    collection of HDF5 files as a single HDF5 dataset and to use the HDF5 APIs
    to work with that dataset. *

    NOTE: There is a known issue with the h5repack utility when using it to
    modify the layout of a VDS. We understand the issue and are working on a
    patch for it.

  o New indexing structures for chunked datasets were added to support SWMR
    and to optimize performance. *

  o Persistent free file space can now be managed and tracked for better
    performance. *

  o The HDF5 Collective Metadata I/O feature has been added to improve
    performance when reading and writing data collectively with Parallel HDF5.

  o The Java HDF5 JNI has been integrated into HDF5.

  o Changes were made in how autotools handles large file support (LFS).

  o New options for the storage and filtering of partial edge chunks have been
    added for performance tuning.*

Files created with the new extensions will not be readable by applications
based on the HDF5-1.8 library.

Please refer to the following document which describes the new features in this


All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document:


For detailed information regarding this release see the release notes:


For questions regarding these or other HDF issues, contact: