libdb/docs/upgrading/upgrade_4_6_disk.html
2012-11-14 16:35:20 -05:00

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<link rel="up" href="upgrade_4_6_toc.html" title="Chapter 4. Upgrading Berkeley DB 4.5 applications to Berkeley DB 4.6" />
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<p>Library Version 11.2.5.3</p>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_4_6_win.html">Prev</a> </td>
<th width="60%" align="center">Chapter 4. Upgrading Berkeley DB 4.5 applications to Berkeley DB 4.6</th>
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<h2 class="title" style="clear: both"><a id="upgrade_4_6_disk"></a>Upgrade Requirements</h2>
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<p>The log file format changed in the Berkeley DB 4.6 release.</p>
<p>The format of Hash database pages was changed in the Berkeley DB 4.6 release,
and items are now stored in sorted order. <span class="bold"><strong>The format changes
are entirely backward-compatible, and no database upgrades are needed.</strong></span>
However, upgrading existing databases can offer significant performance
improvements. Note that databases created using the 4.6 release may not
be usable with earlier Berkeley DB releases.</p>
<p>For further information on upgrading Berkeley DB installations, see
<a class="xref" href="upgrade_process.html" title="Chapter 2.  Upgrading from previous versions of Berkeley DB">
Upgrading from previous versions of Berkeley DB
</a>.</p>
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<td width="40%" align="right" valign="top"> Berkeley DB 4.6.21 Change Log</td>
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