mirror of
https://github.com/HDFGroup/hdf5.git
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a901d24a8b
Purpose:
Renamed old "HDF5 User's Guide" as "HDF5 User's Guide, Release 1.4.5".
Added navigation bar link to new user's guide on HDF server.
Changed release tag line (in old UG only) back to
"Describes HDF5 Release 1.4.5, February 200 3"
Platforms tested:
IE 5
170 lines
6.8 KiB
HTML
170 lines
6.8 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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<!-- #BeginLibraryItem "/ed_libs/styles_UG.lbi" -->
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<!--
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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-->
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<link href="ed_styles/UGelect.css" rel="stylesheet" type="text/css">
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<!-- #EndLibraryItem --></head>
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<body bgcolor="#FFFFFF">
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<!-- #BeginLibraryItem "/ed_libs/NavBar_UG.lbi" --><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="index.html">HDF5 documents and links</a> <br>
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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="http://hdf.ncsa.uiuc.edu/HDF5/doc/UG/index.html">HDF5 User's Guide for Release 1.6</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 from Release 1.4.5:</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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<a href="Environment.html">Environment</a>
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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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<!-- #EndLibraryItem --><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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<br><br>
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<!-- #BeginLibraryItem "/ed_libs/NavBar_UG.lbi" --><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="index.html">HDF5 documents and links</a> <br>
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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="http://hdf.ncsa.uiuc.edu/HDF5/doc/UG/index.html">HDF5 User's Guide for Release 1.6</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 from Release 1.4.5:</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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<a href="Environment.html">Environment</a>
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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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<!-- #EndLibraryItem --><!-- #BeginLibraryItem "/ed_libs/Footer.lbi" --><address>
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<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
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<br>
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Describes HDF5 Release 1.4.5, February 2003
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</address><!-- #EndLibraryItem -->
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Last modified: 13 December 1999
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</body>
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</html>
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