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<title>Berkeley DB Reference Guide: Compatibility with historic UNIX interfaces</title>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Programmer Notes</dl></h3></td>
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<h1 align=center>Compatibility with historic UNIX interfaces</h1>
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<p>The Berkeley DB version 2 library provides backward-compatible interfaces for
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the historic UNIX <a href="../../api_c/dbm.html">dbm</a>, <a href="../../api_c/dbm.html">ndbm</a>, and <a href="../../api_c/hsearch.html">hsearch</a>
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interfaces. It also provides a backward-compatible interface for the
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historic Berkeley DB 1.85 release.
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<p>Berkeley DB version 2 does not provide database compatibility for any of the
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previous interfaces, and existing databases must be converted manually.
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To convert existing databases from the Berkeley DB 1.85 format to the Berkeley DB
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version 2 format, review the <a href="../../utility/db_dump.html">db_dump185</a> and <a href="../../utility/db_load.html">db_load</a>
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information. No utilities are provided to convert UNIX <a href="../../api_c/dbm.html">dbm</a>,
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<a href="../../api_c/dbm.html">ndbm</a>, or <a href="../../api_c/hsearch.html">hsearch</a> databases.
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