Databases Reference
In-Depth Information
Figure 12-3
ASIA
• Tokyo
EUROPE
ARCTIC
OCEAN
GREENLAND
(DEN.)
• Paris
U.K.
AFRICA
CANADA
A
B
C
NORTH AMERICA
PACIFIC
OCEAN
D
E
F
ATLANTIC
OCEAN
• New York
UNITED STATES
• Memphis
Los Angeles •
Gulf of
Mexico
MEXICO
Caribbean
Sea
SOUTH AMERICA
Centrally located data.
Reduce data communication requirements.
▲
Improve performance during data operations.
▲
Keep data physically near its primary consumers.
▲
Have the data owner and primary consumer take some responsibility for
upkeep.
▲
Before distributing the data, or even considering a distributed data environment,
you need to plan how you would divide the data, how it would be maintained,
and the potential impact on data operations. If migrating from a centralized to a
distributed environment, you must think about how the change will affect access
requirements, database applications, security configurations, and any number of
other design considerations. You must accept that the issue is not
if
these design
characteristics will change in the new environment, but
how
they will change. A
