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filter will succeed but the data will not be compressed.
3.2. Szip (optional)
- The HDF5 Library includes a predefined compression filter that
- uses the extended-Rice lossless compression algorithm for chunked
- datasets. For more information about Szip compression and license
+ The HDF5 Library includes a predefined compression filter that
+ uses the extended-Rice lossless compression algorithm for chunked
+ datasets. For more information about Szip compression and license
terms, see http://hdfgroup.org/doc_resource/SZIP/.
- Precompiled Szip binaries for each supported platform and a source
- tar file can be found at ftp://ftp.hdfgroup.org/lib-external/szip/.
-
- To configure the HDF5 Library with the Szip compression filter, use
- the '--with-szlib=/PATH_TO_SZIP' flag. For more information, see
+ The Szip source code can be obtained from the HDF5 Download page
+ http://www.hdfgroup.org/HDF5/release/obtain5.html#extlibs. Building
+ instructions are available with the Szip source code.
+
+ The HDF Group does not distribute separate Szip precompiled libraries,
+ but the HDF5 binaries available from
+ http://www.hdfgroup.org/HDF5/release/obtain5.html include
+ the Szip encoder enabled binary for the corresponding platform.
+
+ To configure the HDF5 Library with the Szip compression filter, use
+ the '--with-szlib=/PATH_TO_SZIP' flag. For more information, see
section 4.3.7, "Specifying other libraries and headers."
- Starting with release 1.6.3, Szip library binaries are distributed
- with the encoder enabled (a license may be required to use this binary)
- and with the encoder disabled (freely usable without a license).
- If the encoder enabled binary is used, Szip compression encoding is
- available for an HDF5 application; if the encoder disabled binary is
- used, Szip compression is not available. Szip decoding is always
- available for applications (i.e., an HDF5 application can always read
- Szip-compressed data) if the Szip filter is present, regardless of the
- binary used.
+ Please notice that if HDF5 configure cannot find a valid Szip library,
+ configure will not fail; in this case, the compression filter will
+ not be available to the applications.
+
+ To check if Szip compression was successfully configured in,
+ check the "I/O filters (external):" line in the configure output,
+ summary section, printed to the standard output.
3.3. MPI and MPI-IO
The parallel version of the library is built upon the foundation