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    <title>Chapter 4.  Access Method Wrapup</title>
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          <th colspan="3" align="center">Chapter 4. 
		Access Method Wrapup
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            <h2 class="title"><a id="am_misc"></a>Chapter 4. 
		Access Method Wrapup
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      <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>
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              <dt>
                <span class="sect2">
                  <a href="am_misc_bulk.html#am_misc_bulk_get">Bulk retrieval</a>
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                <span class="sect2">
                  <a href="am_misc_bulk.html#am_misc_bulk_put">Bulk updates</a>
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              <dt>
                <span class="sect2">
                  <a href="am_misc_bulk.html#am_misc_bulk_del">Bulk deletes</a>
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          <dt>
            <span class="sect1">
              <a href="am_misc_partial.html">Partial record storage and retrieval</a>
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          </dt>
          <dt>
            <span class="sect1">
              <a href="am_misc_struct.html">Storing C/C++ structures/objects</a>
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          </dt>
          <dt>
            <span class="sect1">
              <a href="am_misc_perm.html">Retrieved key/data permanence for C/C++</a>
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          </dt>
          <dt>
            <span class="sect1">
              <a href="am_misc_error.html">Error support</a>
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          <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>
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          <dt>
            <span class="sect1">
              <a href="am_misc_diskspace.html">Disk space requirements</a>
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          </dt>
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            <dl>
              <dt>
                <span class="sect2">
                  <a href="am_misc_diskspace.html#idp51253016">Btree</a>
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            </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>
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          <td width="40%" align="left" valign="top">Cursor operations </td>
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          <td width="40%" align="right" valign="top"> Retrieving and updating records in bulk</td>
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