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Distributed Database Systems
Fragmentation provides several disadvantages also. Owing to data fragmentation, performance
can degrade, and maintaining integrity may become diffi cult.
(i) Performance degradation – The performance of global applications that require data from
several fragments located at different sites may become slower and, therefore, performance
may degrade. For example, in case of global applications, it may be necessary to retrieve data
from more than one fragment located at different sites. In this case, performing either union or
join of these fragments becomes slower and costly.
(ii) Maintaining integrity becomes ...