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 Recovery Management
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173
10.6.2 Optimistic Protocols
Optimistic protocols emphasize on availability and use an optimistic concurrency control approach
in which updates are allowed to proceed independently in the various partitions to terminate the
transaction. Replication of data items improves availability. In this case, inconsistencies are likely
when sites recover from network partitioning, but these inconsistencies can be eliminated later.
The resolution of inconsistencies depends upon the semantics of the transactions.
One protocol for enforcing consistency of replicated data items is ROWA (read-one-write-
all) protocol [described ...
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