Databases Reference
In-Depth Information
performance of new components might not be possible (e.g., specialized
concurrency control for new index structures). As for the latter point, more
research is needed to fully understand the implications and side effects of
CDBMSs.
The work conducted in the area of CDBMSs has focused on extensions
in the area of new data types (including indexes useful for those nonstandard
types). Componentization of the DBMS kernel, including the transaction
manager and the query processor in general and the optimizer in particular,
has been considered less thoroughly so far. In those areas, a better under-
standing of the implications and limitations of componentization is neces-
sary. It might turn out that subsystems also need to be componentized and
that it might be possible to specialize them by adding or replacing new
(sub)components.
Despite the problems that still need to be addressed, component
DBMSs will certainly gain practical significance, and componentization of
DBMSs will continue to be a major trend in DB technology.
References
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