May 2024
Intermediate to advanced
325 pages
12h 2m
English
Content preview from Distributed Database Systems, 1st Edition by Chhanda Ray
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Distributed Database Systems
(e) Minimal communication costs – The cost of processing remote requests must be considered
during data distribution. Retrieval cost is minimized when locality of reference is maximized
or when each site has its own copy of the data. However, when replicated data are updated, the
update has to be performed at all sites holding a replica, thwereby increasing the communica-
tion costs.
5.2.1 Alternative Strategies for Data Allocation
Four alternative strategies have been identifi ed for data allocation. This section describes these
different data allocation strategies and also draws a comparison between them.
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