<?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>Dbstl typical use cases</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="stl.html" title="Chapter 7. Standard Template Library API" /> <link rel="prev" href="stl.html" title="Chapter 7. Standard Template Library API" /> <link rel="next" href="stl_examples.html" title="Dbstl examples" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Dbstl typical use cases</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="stl.html">Prev</a> </td> <th width="60%" align="center">Chapter 7. Standard Template Library API</th> <td width="20%" align="right"> <a accesskey="n" href="stl_examples.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="stl_usecase"></a>Dbstl typical use cases</h2></div></div></div> Among others, the following are some typical use cases where dbstl would be prefered over C++ STL: <div class="itemizedlist"><ul type="disc"><li><p> Working with a large amount of data, more than can reside in memory. Using C++ STL would force a number of page swaps, which will degrade performance. When using dbstl, data is stored in a database and Berkeley DB ensures the needed data is in memory, so that the overall performance of the machine is not slowed down. </p></li><li><p> Familiar Interface. dbstl provides a familiar interface to Berkeley DB, hiding the marshalling and unmashalling details and automatically managing Berkeley DB structures and objects. </p></li><li><p> Transaction semantics. dbstl provides the ACID properties (or a subset of the ACID properties) in addition to supporting all of the STL functionality. </p></li><li><p> Concurrent access. Few (if any) existing C++ STL implementations support reading/writing to the same container concurrently, dbstl does. </p></li><li><p> Object persistence. dbstl allows your application to store objects in a database, and use the objects across different runs of your application. dbstl is capable of storing complicated objects which are not located in a contiguous chunk of memory, with some user configurations. </p></li></ul></div></div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="stl.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="stl.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="stl_examples.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Chapter 7. Standard Template Library API </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Dbstl examples</td> </tr> </table> </div> </body> </html>