Databases Reference
In-Depth Information
Chapter 23
Detailed Design and
Application of
Distributed Database
Management
Systems
Elizabeth N. Fong, Charles L. Sheppard, and
Kathryn A. Harvill
T
HE
DETAILED
DESIGN
AND
INSTALLATION
OF
A
DISTRIBUTED
DATABASE
.
ENVIRONMENT
Because so many
people will ultimately benefit from or be affected by the distributed data-
base management system (DBMS), the selection of the most appropriate
hardware and software for an organization's specific needs is paramount.
In addition, once the new system is in place, continuous support is needed
to ensure that any problems are handled quickly and that new needs are
addressed as they arise.
DEALS
WITH
A
WIDE
RANGE
OF
ISSUES
HARDWARE DESIGN
The hardware design issue is centered on the client/server model. The
node with the fastest or most powerful computing power is generally
assigned the role of server. As server, it handles most of the processing and
data storage. The two important aspects to be considered in choosing
server nodes are processing power and storage capacity.
The processing power of a server is critical to the response time avail-
able to queries (i.e., servers should not be allowed to become bottlenecks
of the distributed database community). Another concern related to the
server's processing power is the fact that other processes may be compet-
ing for processing time other than database requests. Therefore, an exces-
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