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Yasuhiro KIMURA
111 lines
4.4 KiB
HTML
111 lines
4.4 KiB
HTML
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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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<title>Dbstl typical use cases</title>
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<link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" />
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<p>Library Version 18.1.40</p>
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<th colspan="3" align="center">Dbstl typical use cases</th>
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<td width="20%" align="left"><a accesskey="p" href="stl.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 7. Standard Template Library API</th>
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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="stl_usecase"></a>Dbstl typical use cases</h2>
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</div>
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</div>
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</div>
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<p>
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Among others, the following are some typical use cases where dbstl
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would be prefered over C++ STL:
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<p>
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Working with a large amount of data, more than can
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reside in memory. Using C++ STL would force a number
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of page swaps, which will degrade performance. When
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using dbstl, data is stored in a database and Berkeley
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DB ensures the needed data is in memory, so that the
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overall performance of the machine is not slowed down.
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</p>
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</li>
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<li>
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<p>
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Familiar Interface. dbstl provides a familiar
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interface to Berkeley DB, hiding the marshalling and
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unmashalling details and automatically managing
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Berkeley DB structures and objects.
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</p>
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</li>
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<li>
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<p>
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Transaction semantics. dbstl provides the ACID
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properties (or a subset of the ACID properties) in
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addition to supporting all of the STL functionality.
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</p>
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</li>
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<li>
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<p>
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Concurrent access. Few (if any) existing C++ STL
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implementations support reading/writing to the same
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container concurrently, dbstl does.
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</p>
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</li>
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<li>
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<p>
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Object persistence. dbstl allows your application
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to store objects in a database, and use the objects
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across different runs of your application. dbstl is
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capable of storing complicated objects which are not
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located in a contiguous chunk of memory, with some
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user configurations.
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</p>
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</li>
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</ul>
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<a accesskey="u" href="stl.html">Up</a>
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<td width="40%" align="right"> <a accesskey="n" href="stl_examples.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 7. Standard Template Library API </td>
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<a accesskey="h" href="index.html">Home</a>
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