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<title>Berkeley DB Reference Guide: Run-time configuration</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<table><tr valign=top>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Programmer Notes</dl></h3></td>
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<td width="1%"><a href="../../ref/program/extending.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/lock/intro.html"><img src="../../images/next.gif" alt="Next"></a>
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</td></tr></table>
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<p>
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<h1 align=center>Run-time configuration</h1>
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<p>There are a few interfaces that support run-time configuration of Berkeley DB.
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First is a group of interfaces that allow applications to intercept
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Berkeley DB requests for underlying library or system call functionality:
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<p><blockquote><pre><a href="../../api_c/set_func_close.html">db_env_set_func_close</a>
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<a href="../../api_c/set_func_dirfree.html">db_env_set_func_dirfree</a>
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<a href="../../api_c/set_func_dirlist.html">db_env_set_func_dirlist</a>
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<a href="../../api_c/set_func_exists.html">db_env_set_func_exists</a>
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<a href="../../api_c/set_func_free.html">db_env_set_func_free</a>
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<a href="../../api_c/set_func_fsync.html">db_env_set_func_fsync</a>
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<a href="../../api_c/set_func_ioinfo.html">db_env_set_func_ioinfo</a>
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<a href="../../api_c/set_func_malloc.html">db_env_set_func_malloc</a>
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<a href="../../api_c/set_func_map.html">db_env_set_func_map</a>
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<a href="../../api_c/set_func_open.html">db_env_set_func_open</a>
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<a href="../../api_c/set_func_read.html">db_env_set_func_read</a>
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<a href="../../api_c/set_func_realloc.html">db_env_set_func_realloc</a>
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<a href="../../api_c/set_func_seek.html">db_env_set_func_seek</a>
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<a href="../../api_c/set_func_sleep.html">db_env_set_func_sleep</a>
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<a href="../../api_c/set_func_unlink.html">db_env_set_func_unlink</a>
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<a href="../../api_c/set_func_unmap.html">db_env_set_func_unmap</a>
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<a href="../../api_c/set_func_write.html">db_env_set_func_write</a>
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<a href="../../api_c/set_func_yield.html">db_env_set_func_yield</a></pre></blockquote>
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<p>These interfaces are only available from the Berkeley DB C language API.
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<p>In addition, there are a few interfaces that allow applications to
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re-configure, on an application-wide basis, Berkeley DB behaviors.
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<p><blockquote><pre><a href="../../api_c/env_set_mutexlocks.html">DBENV->set_mutexlocks</a>
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<a href="../../api_c/env_set_pageyield.html">db_env_set_pageyield</a>
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<a href="../../api_c/env_set_panicstate.html">db_env_set_panicstate</a>
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<a href="../../api_c/env_set_region_init.html">db_env_set_region_init</a>
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<a href="../../api_c/env_set_tas_spins.html">db_env_set_tas_spins</a></pre></blockquote>
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<p>These interfaces are available from all of the Berkeley DB programmatic APIs.
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<p>A not-uncommon problem for applications is the new API in Solaris 2.6
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for manipulating large files. As this API was not part of Solaris 2.5,
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it is difficult to create a single binary that takes advantage of the
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large file functionality in Solaris 2.6 but which still runs on Solaris
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2.5. <a href="solaris.txt">Example code</a> that supports this is
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included in the Berkeley DB distribution.
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<table><tr><td><br></td><td width="1%"><a href="../../ref/program/extending.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/lock/intro.html"><img src="../../images/next.gif" alt="Next"></a>
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