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<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.
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