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[svn-r681] Environment.html New file. Environmental variables and configuration parameters. Copyright.html New file. Copyright statement, linked into User's Guide and Reference Manual.
1998-09-10 21:59:48 +08:00
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
[svn-r949] Changes since 19981124 ---------------------- ./src/H5T.c Fixed a typo in the registration of the `unsigned char' to `unsigned long long' type conversion that caused it to not be registered, falling back to software whenever that conversion path was taken. ./MANIFEST ./test/Makefile.in ./test/testhdf5.c ./test/testhdf5.h ./test/theap.c [REMOVED] ./test/lheap.c [NEW] ./test/tohdr.c [REMOVED] ./test/ohdr.c [NEW] ./test/tstab.c [REMOVED] ./test/stab.c [NEW] Removed the `t' from the front of these names and made each test a stand-alone program following the format of most of the other tests. ./test/big.c Uses libh5test.a but always sets the low-level driver to 1GB file family. The `#if' near the top to set the data space to 8GB has been simplified now that `long_long' is always defined and the error message is improved when `long_long' isn't wide enough. Cleanup code was added to the error handling. ./test/gheap.c ./test/istore.c Uses libh5test.a. Added error cleanup code. ./test/dtypes.c ./test/h5test.c Added 68 new tests that check hardware and software conversions between `long long' and `unsigned long long' and the other integer types. The tests only run on machines where sizeof(long_long)!=sizeof(long). We test a total of 180 different integer conversions, half in hardware and half in software. Cut down the number of times each test is run from 5 to 1 so it doesn't take so long. If you want to run more times there's a constant that can be changed at the top of the file. ./test/extend.c Removed unused variable. ./test/h5test.c ./test/h5test.h ./test/external.c ./test/fillval.c The h5_cleanup() returns true/false so it can be used in an `if' statement to clean up additional files. ./doc/html/Environment.html Indented. Added HDF5_PREFIX and HDF5_DRIVER descriptions. ./src/H5P.c Changed the trace type for the second argument from `Iu' to `x' since it's an output parameter. ./INSTALL Added a warning that the GNU zlib that comes with the latest version of HDF4 is too old to use with HDF5 and must be renamed so configure doesn't see it when `--enable-hdf4' is used.
1998-11-25 22:58:22 +08:00
<head>
<title>HDF5 Library Environment Variables
and Configuration Parameters</title>
</head>
<body>
<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:
<center>
<table width="90%">
<tr>
<th>Variable</th>
<th>Description</th>
</tr>
<tr valign=top>
<td><code>HDF5_DEBUG</code></td>
<td>Defines a list of debugging switches documented in the
<a href="Debugging.html">Debugging</a> section of the
<cite>HDF5 User's Guide</cite>.</td>
</tr>
<tr valign=top>
<td><code>HDF5_NOCLEANUP</code></td>
<td>If set then programs in the test directories do not
remove temporary files. The default is for each test to
remove the files before exit if the test succeeds but to
leave the files if the test fails.</td>
</tr>
<tr valign=top>
<td><code>HDF5_PREFIX</code></td>
<td>The value of this variable is prepended to all temporary
file names created by the test programs and separated from
the base name of the file by a slash. The default is no
prefix.</td>
</tr>
<tr valign=top>
<td><ode>HDF5_DRIVER</code></td>
<td>This variable should hold the name of a low-level HDF5
file driver such as <code>sec2</code>, <code>stdio</code>,
<code>core</code>, <code>split</code>, or
<code>family</code>. The family driver also takes an
optional real-valued family member size in MB which
defaults to 1. If this variable is not set or empty then
the library-defined default file driver is used (which can
be set at configuration time with the H5F_LOW_DFLT cpp
constant, usually <code>sec2</code>).</td>
</tr>
<tr valign=top>
<td><code>HDF5_MPI_OPT_TYPES</code></td>
<td>When set to <code>1</code>, parallel HDF5 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.</td>
</tr>
<tr valign=top>
<td><code>HDF5_MPI_1_METAWRITE</code></td>
<td>When set to <code>1</code>, parallel HDF5 will write the
metadata via process 0 of each opened parallel HDF5 file.
This should improve I/O throughput. The default is not to
use this optimization.</td>
</tr>
</table>
</center>
<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.
<hr>
<address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
</address>
Last modified: 9 September 1998
</body>
[svn-r681] Environment.html New file. Environmental variables and configuration parameters. Copyright.html New file. Copyright statement, linked into User's Guide and Reference Manual.
1998-09-10 21:59:48 +08:00
</html>
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