Software Changes from Release to Release for HDF5 1.14

This page provides information on the changes that a maintenance developer needs to be aware of between successive releases of HDF5, such as:

• New or changed features or tools
• Syntax and behavioral changes in the existing application programming interface (the API)
• Certain types of changes in configuration or build processes

Note that bug fixes and performance enhancements in the C library are automatically picked up by the C++, Fortran, and Java libraries.

The following information is included below.

• Changes from 1.12.2 to 1.14.0

The release notes also list changes made to the library, but these notes tend to be more at a more detail-oriented level. The release notes may include new features, bugs fixed, supported configuration features, platforms on which the library has been tested, and known problems. The release note files are listed below and can be found at the top level of the HDF5 source code tree in the release_docs directory.

Changes from 1.12.2 to 1.14.0

HDF5 version 1.14.0 introduces the following new features:

• Asynchronous I/O operations
• New tools h5dwalk and h5delete
• Subfiling VFD
• Onion VFD
• Multi Dataset I/O

Users might find these names familiar already and that is because they were introduced in the experimental series 1.13.

In addition, this version provides many new C APIs and other user-visible changes in behavior in the transition from HDF5 Release 1.12.2 to Release 1.14.0.  HDF5 1.14.0 adds no new API calls that require use of the API Compatibility Macros for the main library.  Some calls have been removed or have had their signature change, however.

New and Changed Functions, Classes, Subroutines, Wrappers, and Macros

In the C Interface (main library)

Following are the new APIs introduced in HDF5-1.14.0.