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Purpose:
Update "Describes HDF5 Release..." footer from R1.4 to
"Release 1.5, Unreleased Development Branch"
Platforms tested:
IE 5
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HTML
154 lines
5.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>Environment Variables and Configuration Parameters</title>
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</head>
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<body bgcolor="#FFFFFF">
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<hr>
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<center>
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<table border=0 width=98%>
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<tr><td valign=top align=left>
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<a href="H5.intro.html">Introduction to HDF5</a> <br>
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<a href="RM_H5Front.html">HDF5 Reference Manual</a> <br>
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<a href="index.html">Other HDF5 documents and links</a> <br>
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<!--
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<a href="Glossary.html">Glossary</a><br>
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-->
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</td>
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<td valign=top align=right>
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And in this document, the
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<a href="H5.user.html"><strong>HDF5 User's Guide:</strong></a>
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<br>
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<a href="Files.html">Files</a>
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<a href="Datasets.html">Datasets</a>
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<a href="Datatypes.html">Datatypes</a>
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<a href="Dataspaces.html">Dataspaces</a>
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<a href="Groups.html">Groups</a>
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<br>
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<a href="References.html">References</a>
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<a href="Attributes.html">Attributes</a>
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<a href="Properties.html">Property Lists</a>
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<a href="Errors.html">Error Handling</a>
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<br>
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<a href="Filters.html">Filters</a>
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<a href="Caching.html">Caching</a>
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<a href="Chunking.html">Chunking</a>
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<a href="MountingFiles.html">Mounting Files</a>
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<br>
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<a href="Performance.html">Performance</a>
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<a href="Debugging.html">Debugging</a>
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Environment
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<a href="ddl.html">DDL</a>
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</td></tr>
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</table>
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</center>
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<hr>
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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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<center>
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<table border=0 width=98%>
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<tr><td valign=top align=left>
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<a href="H5.intro.html">Introduction to HDF5</a> <br>
|
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<a href="RM_H5Front.html">HDF5 Reference Manual</a> <br>
|
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<a href="index.html">Other HDF5 documents and links</a> <br>
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<!--
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<a href="Glossary.html">Glossary</a><br>
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-->
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</td>
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<td valign=top align=right>
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And in this document, the
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<a href="H5.user.html"><strong>HDF5 User's Guide:</strong></a>
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<br>
|
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<a href="Files.html">Files</a>
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<a href="Datasets.html">Datasets</a>
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<a href="Datatypes.html">Datatypes</a>
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<a href="Dataspaces.html">Dataspaces</a>
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<a href="Groups.html">Groups</a>
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<br>
|
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<a href="References.html">References</a>
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<a href="Attributes.html">Attributes</a>
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<a href="Properties.html">Property Lists</a>
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<a href="Errors.html">Error Handling</a>
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<br>
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<a href="Filters.html">Filters</a>
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<a href="Caching.html">Caching</a>
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<a href="Chunking.html">Chunking</a>
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<a href="MountingFiles.html">Mounting Files</a>
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<br>
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<a href="Performance.html">Performance</a>
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<a href="Debugging.html">Debugging</a>
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Environment
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<a href="ddl.html">DDL</a>
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</td></tr>
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</table>
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</center>
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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: 13 December 1999
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<br>
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Describes HDF5 Release 1.5, Unrealeased Development Branch
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</body>
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</html>
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