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 Concurrency Control
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137
In this algorithm Rule1 is used to ensure that the transactions are executed serially according to
their timestamp ordering. Rule2 indicates that the set of data items written by the older transaction
are not read by the younger transaction, and the older transaction completes its write phase before
the younger transaction enters its validate phase. Rule3 state that the updates on data items made
by the older transaction do not affect the read phase or write phase of the younger transaction,
but as in Rule2 it does not require that the older transaction fi nish writing on data items before the
younger transaction ...
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