mirror of
https://github.com/yasuhirokimura/db18
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Yasuhiro KIMURA
172 lines
6.8 KiB
HTML
172 lines
6.8 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Database Slices</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Installation and Build Guide" />
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<link rel="up" href="upgrade_62_toc.html" title="Chapter 9. Upgrading Berkeley DB 12.1.6.1 applications to Berkeley DB 12.1.6.2" />
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<link rel="prev" href="upgrade_62_toc.html" title="Chapter 9. Upgrading Berkeley DB 12.1.6.1 applications to Berkeley DB 12.1.6.2" />
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<link rel="next" href="renaming_blobs_external.html" title="Renaming the BLOB file feature to External Files" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 18.1.40</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Database Slices</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_62_toc.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 9. Upgrading Berkeley DB 12.1.6.1 applications to Berkeley DB 12.1.6.2 </th>
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<td width="20%" align="right"> <a accesskey="n" href="renaming_blobs_external.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_slices"></a>Database Slices</h2>
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</div>
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</div>
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</div>
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<div class="toc">
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<dl>
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<dt>
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<span class="sect2">
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<a href="upgrade_slices.html#idm140649572912624">New Functions</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="upgrade_slices.html#idm140649572903136">New Error</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="upgrade_slices.html#idm140649572894448">New Parameter Values</a>
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</span>
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</dt>
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</dl>
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</div>
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<p>
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Berkeley DB supports a new SMP-optimized data model that is
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especially valuable for highly multithreaded applications.
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A sliced Berkeley DB instance contains a collection of related
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Berkeley DB environments known as slices, each containing a
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disjoint subset of records. Transactional consistency is
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maintained within an individual slice but not across multiple
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slices.
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</p>
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<p>
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Database slices are enabled with a configuration option
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when building Berkeley DB and a simple addition to the
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DB_CONFIG file. Database slices are supported on UNIX/POSIX
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platforms.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572912624"></a>New Functions</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<code class="literal">
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<a href="../api_reference/C/envget_slice_count.html" class="olink">DB_ENV->get_slice_count()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/envget_slices.html" class="olink">DB_ENV->get_slices()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbset_slice_callback.html" class="olink">DB->set_slice_callback()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbget_slices.html" class="olink">DB->get_slices()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbslice_lookup.html" class="olink">DB->slice_lookup()</a>
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</code>
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572903136"></a>New Error</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<code class="literal">DB_SLICE_CORRUPT</code>
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572894448"></a>New Parameter Values</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li><code class="literal">DB_SLICED</code> — A new
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<code class="literal">flags</code>
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parameter value for the <a href="../api_reference/C/dbopen.html" class="olink">DB->open()</a> method to indicate
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that the database is sliced.
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</li>
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<li><code class="literal">DB_VERB_SLICED</code> — A new
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<code class="literal">which</code>
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parameter value for the <a href="../api_reference/C/envset_verbose.html" class="olink">DB_ENV->set_verbose()</a> method to
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request verbose output for database slices.
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</li>
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</ul>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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||
<table width="100%" summary="Navigation footer">
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||
<tr>
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||
<td width="40%" align="left"><a accesskey="p" href="upgrade_62_toc.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_62_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="renaming_blobs_external.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter 9. Upgrading Berkeley DB 12.1.6.1 applications to Berkeley DB 12.1.6.2 </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Renaming the BLOB file feature to External Files</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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