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New file. Environmental variables and configuration parameters. Copyright.html New file. Copyright statement, linked into User's Guide and Reference Manual.
67 lines
2.0 KiB
HTML
67 lines
2.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>HDF5 Library Environment Variables and Configuration Parameters</title>
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</head>
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<body>
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<h1>HDF5 Library Environment Variables and Configuration Parameters</h1>
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<h2>1. Environment Variables</h2>
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The HDF5 library uses UNIX environment variables to control
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or adjust certain library features at runtime. The variables and
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their defined effects are as follows:
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<dir>
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<dl>
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<dt><tt>HDF5_DEBUG</tt>
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<dd>Defines a list of debugging switches documented in the
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<a href="Debugging.html">Debugging</a> section of the
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<cite>HDF5 User's Guide</cite>.
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<dt><tt>HDF5_NOCLEANUP</tt>
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<dd>When set to a non-empty value, the programs in the test
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directory do not remove temporary HDF5 data files.
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The default is for each test to remove the files before exit.
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<dt><tt>HDF5_MPI_OPT_TYPES</tt>
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(for parallel beta version only)
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<dd>When set to <code>1</code>, PHDF5 will use the MPI optimized
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code to perform parallel read/write accesses to datasets.
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Currently, this optimization fails when accessing extendable
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datasets. The default is not to use the optimized code.
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<dt><tt>HDF5_MPI_1_METAWRITE</tt>
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(for parallel beta version only)
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<dd>When set to <code>1</code>, PHDF5 will write the metadata
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via process 0 of each opened parallel HDF5 file. This should
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improve I/O throughput. The default is not to use this
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optimization.
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</dl>
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</dir>
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<h2>2. Configuration Parameters</h2>
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The HDF5 configuration script accepts a list of parameters to control
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configuration features when creating the Makefiles for the library.
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The command
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<br>
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<code> configure --help </code>
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<br>
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will display the current list of parameters and their effects.
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<hr>
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<address>
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<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
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</address>
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Last modified: 9 September 1998
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</body>
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</html>
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