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authorLorry <lorry@roadtrain.codethink.co.uk>2012-07-20 20:00:05 +0100
committerLorry <lorry@roadtrain.codethink.co.uk>2012-07-20 20:00:05 +0100
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+ <head>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+ <title>Chapter 4.  Access Method Wrapup</title>
+ <link rel="stylesheet" href="gettingStarted.css" type="text/css" />
+ <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
+ <link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" />
+ <link rel="up" href="index.html" title="Berkeley DB Programmer's Reference Guide" />
+ <link rel="prev" href="am_cursor.html" title="Cursor operations" />
+ <link rel="next" href="am_misc_bulk.html" title="Retrieving and updating records in bulk" />
+ </head>
+ <body>
+ <div xmlns="" class="navheader">
+ <div class="libver">
+ <p>Library Version 11.2.5.3</p>
+ </div>
+ <table width="100%" summary="Navigation header">
+ <tr>
+ <th colspan="3" align="center">Chapter 4. 
+ Access Method Wrapup
+ </th>
+ </tr>
+ <tr>
+ <td width="20%" align="left"><a accesskey="p" href="am_cursor.html">Prev</a> </td>
+ <th width="60%" align="center"> </th>
+ <td width="20%" align="right"> <a accesskey="n" href="am_misc_bulk.html">Next</a></td>
+ </tr>
+ </table>
+ <hr />
+ </div>
+ <div class="chapter" lang="en" xml:lang="en">
+ <div class="titlepage">
+ <div>
+ <div>
+ <h2 class="title"><a id="am_misc"></a>Chapter 4. 
+ Access Method Wrapup
+ </h2>
+ </div>
+ </div>
+ </div>
+ <div class="toc">
+ <p>
+ <b>Table of Contents</b>
+ </p>
+ <dl>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc.html#am_misc_align">Data alignment</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_bulk.html">Retrieving and updating records in bulk</a>
+ </span>
+ </dt>
+ <dd>
+ <dl>
+ <dt>
+ <span class="sect2">
+ <a href="am_misc_bulk.html#am_misc_bulk_get">Bulk retrieval</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect2">
+ <a href="am_misc_bulk.html#am_misc_bulk_put">Bulk updates</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect2">
+ <a href="am_misc_bulk.html#am_misc_bulk_del">Bulk deletes</a>
+ </span>
+ </dt>
+ </dl>
+ </dd>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_partial.html">Partial record storage and retrieval</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_struct.html">Storing C/C++ structures/objects</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_perm.html">Retrieved key/data permanence for C/C++</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_error.html">Error support</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_stability.html">Cursor stability</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_dbsizes.html">Database limits</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_diskspace.html">Disk space requirements</a>
+ </span>
+ </dt>
+ <dd>
+ <dl>
+ <dt>
+ <span class="sect2">
+ <a href="am_misc_diskspace.html#idp1074008">Btree</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect2">
+ <a href="am_misc_diskspace.html#idp1074072">Hash</a>
+ </span>
+ </dt>
+ </dl>
+ </dd>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_db_sql.html">Specifying a Berkeley DB schema using SQL DDL</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_tune.html">Access method tuning</a>
+ </span>
+ </dt>
+ <dt>
+ <span class="sect1">
+ <a href="am_misc_faq.html">Access method FAQ</a>
+ </span>
+ </dt>
+ </dl>
+ </div>
+ <div class="sect1" lang="en" xml:lang="en">
+ <div class="titlepage">
+ <div>
+ <div>
+ <h2 class="title" style="clear: both"><a id="am_misc_align"></a>Data alignment</h2>
+ </div>
+ </div>
+ </div>
+ <p>The Berkeley DB access methods provide no guarantees about byte alignment for
+returned key/data pairs, or callback functions which take <a href="../api_reference/C/dbt.html" class="olink">DBT</a>
+references as arguments, and applications are responsible for arranging
+any necessary alignment. The <a href="../api_reference/C/dbt.html#dbt_DB_DBT_MALLOC" class="olink">DB_DBT_MALLOC</a>, <a href="../api_reference/C/dbt.html#dbt_DB_DBT_REALLOC" class="olink">DB_DBT_REALLOC</a>, and
+<a href="../api_reference/C/dbt.html#dbt_DB_DBT_USERMEM" class="olink">DB_DBT_USERMEM</a> flags may be used to
+store returned items in memory of arbitrary alignment.</p>
+ </div>
+ </div>
+ <div class="navfooter">
+ <hr />
+ <table width="100%" summary="Navigation footer">
+ <tr>
+ <td width="40%" align="left"><a accesskey="p" href="am_cursor.html">Prev</a> </td>
+ <td width="20%" align="center"> </td>
+ <td width="40%" align="right"> <a accesskey="n" href="am_misc_bulk.html">Next</a></td>
+ </tr>
+ <tr>
+ <td width="40%" align="left" valign="top">Cursor operations </td>
+ <td width="20%" align="center">
+ <a accesskey="h" href="index.html">Home</a>
+ </td>
+ <td width="40%" align="right" valign="top"> Retrieving and updating records in bulk</td>
+ </tr>
+ </table>
+ </div>
+ </body>
+</html>
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