summaryrefslogtreecommitdiffstats
path: root/doc/html/Environment.html
blob: dfdc10a24e603d55d7455e39cdd8511d3d58c277 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>

<head>
<title>Environment Variables and Configuration Parameters</title>

<!-- #BeginLibraryItem "/ed_libs/styles_UG.lbi" -->
<!--
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * Copyright by the Board of Trustees of the University of Illinois.         *
  * All rights reserved.                                                      *
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
  * the files COPYING and Copyright.html.  COPYING can be found at the root   *
  * of the source code distribution tree; Copyright.html can be found at the  *
  * root level of an installed copy of the electronic HDF5 document set and   *
  * is linked from the top-level documents page.  It can also be found at     *
  * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
  * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 -->

<link href="ed_styles/UGelect.css" rel="stylesheet" type="text/css">
<!-- #EndLibraryItem -->

</head>

<body bgcolor="#FFFFFF">


<!-- #BeginLibraryItem "/ed_libs/NavBar_UG.lbi" --><hr>
<center>
<table border=0 width=98%>
<tr><td valign=top align=left>
    <a href="index.html">HDF5 documents and links</a>&nbsp;<br>
    <a href="H5.intro.html">Introduction to HDF5</a>&nbsp;<br>
    <a href="RM_H5Front.html">HDF5 Reference Manual</a>&nbsp;<br>   
    <a href="http://hdf.ncsa.uiuc.edu/HDF5/doc/UG/index.html">HDF5 User's Guide for Release 1.6</a>&nbsp;<br>
    <!--
    <a href="Glossary.html">Glossary</a><br>
    -->
</td>
<td valign=top align=right>
    And in this document, the 
    <a href="H5.user.html"><strong>HDF5 User's Guide from Release 1.4.5:</strong></a>&nbsp;&nbsp;&nbsp;&nbsp;
        <br>
        <a href="Files.html">Files</a>&nbsp;&nbsp;
        <a href="Datasets.html">Datasets</a>&nbsp;&nbsp;
        <a href="Datatypes.html">Datatypes</a>&nbsp;&nbsp;
        <a href="Dataspaces.html">Dataspaces</a>&nbsp;&nbsp;
        <a href="Groups.html">Groups</a>&nbsp;&nbsp;
        <br>
        <a href="References.html">References</a>&nbsp;&nbsp;
        <a href="Attributes.html">Attributes</a>&nbsp;&nbsp;
        <a href="Properties.html">Property Lists</a>&nbsp;&nbsp;
        <a href="Errors.html">Error Handling</a>&nbsp;&nbsp;
        <br>
        <a href="Filters.html">Filters</a>&nbsp;&nbsp;
        <a href="Caching.html">Caching</a>&nbsp;&nbsp;
        <a href="Chunking.html">Chunking</a>&nbsp;&nbsp;
        <a href="MountingFiles.html">Mounting Files</a>&nbsp;&nbsp;
        <br>
        <a href="Performance.html">Performance</a>&nbsp;&nbsp;
        <a href="Debugging.html">Debugging</a>&nbsp;&nbsp;
        <a href="Environment.html">Environment</a>&nbsp;&nbsp;
        <a href="ddl.html">DDL</a>&nbsp;&nbsp;
</td></tr>
</table>
</center>
<hr>
<!-- #EndLibraryItem --><h1>HDF5 Library Environment Variables and Configuration Parameters</h1>

<h2>1. Environment Variables</h2>

The HDF5 library uses UNIX environment variables to control
or adjust certain library features at runtime.  The variables and 
their defined effects are as follows:

<dir>
<dl>
    <dt><tt>HDF5_DEBUG</tt>
        <dd>Defines a list of debugging switches documented in the
            <a href="Debugging.html">Debugging</a> section of the
            <cite>HDF5 User's Guide</cite>.

    <dt><tt>HDF5_NOCLEANUP</tt>
        <dd>When set to a non-empty value, the programs in the test
            directory do not remove temporary HDF5 data files.
            The default is for each test to remove the files before exit.

    <dt><tt>HDF5_DISABLE_VERSION_CHECK</tt> 
        <dd>When set to <code>1</code>, HDF5 will not abort when the version
            of the HDF5 headers doesn't match the version of the HDF5 library.

    <dt><tt>HDF5_MPI_OPT_TYPES</tt> 
            &nbsp;&nbsp;(for parallel beta version only)
        <dd>When set to <code>1</code>, PHDF5 will use the MPI optimized 
            code to perform parallel read/write accesses to datasets.
            Currently, this optimization fails when accessing extendable
            datasets.  The default is not to use the optimized code.

</dl>
</dir>

<h2>2. Configuration Parameters</h2>

The HDF5 configuration script accepts a list of parameters to control
configuration features when creating the Makefiles for the library.  
The command
<br>
<code>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;configure --help </code>
<br>
will display the current list of parameters and their effects. 
<br><br>


<!-- #BeginLibraryItem "/ed_libs/NavBar_UG.lbi" --><hr>
<center>
<table border=0 width=98%>
<tr><td valign=top align=left>
    <a href="index.html">HDF5 documents and links</a>&nbsp;<br>
    <a href="H5.intro.html">Introduction to HDF5</a>&nbsp;<br>
    <a href="RM_H5Front.html">HDF5 Reference Manual</a>&nbsp;<br>   
    <a href="http://hdf.ncsa.uiuc.edu/HDF5/doc/UG/index.html">HDF5 User's Guide for Release 1.6</a>&nbsp;<br>
    <!--
    <a href="Glossary.html">Glossary</a><br>
    -->
</td>
<td valign=top align=right>
    And in this document, the 
    <a href="H5.user.html"><strong>HDF5 User's Guide from Release 1.4.5:</strong></a>&nbsp;&nbsp;&nbsp;&nbsp;
        <br>
        <a href="Files.html">Files</a>&nbsp;&nbsp;
        <a href="Datasets.html">Datasets</a>&nbsp;&nbsp;
        <a href="Datatypes.html">Datatypes</a>&nbsp;&nbsp;
        <a href="Dataspaces.html">Dataspaces</a>&nbsp;&nbsp;
        <a href="Groups.html">Groups</a>&nbsp;&nbsp;
        <br>
        <a href="References.html">References</a>&nbsp;&nbsp;
        <a href="Attributes.html">Attributes</a>&nbsp;&nbsp;
        <a href="Properties.html">Property Lists</a>&nbsp;&nbsp;
        <a href="Errors.html">Error Handling</a>&nbsp;&nbsp;
        <br>
        <a href="Filters.html">Filters</a>&nbsp;&nbsp;
        <a href="Caching.html">Caching</a>&nbsp;&nbsp;
        <a href="Chunking.html">Chunking</a>&nbsp;&nbsp;
        <a href="MountingFiles.html">Mounting Files</a>&nbsp;&nbsp;
        <br>
        <a href="Performance.html">Performance</a>&nbsp;&nbsp;
        <a href="Debugging.html">Debugging</a>&nbsp;&nbsp;
        <a href="Environment.html">Environment</a>&nbsp;&nbsp;
        <a href="ddl.html">DDL</a>&nbsp;&nbsp;
</td></tr>
</table>
</center>
<hr>
<!-- #EndLibraryItem --><address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a> 
<br>
Describes HDF5 Release 1.4.5, February 2003
</address>
 
Last modified: 13 December 1999
 
</body>
</html>