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Time-Constrained Transaction Management - Real-Time Constraints in Database Transaction Systems (Hardcover, 1996 ed.)
Loot Price: R2,874
Discovery Miles 28 740
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Time-Constrained Transaction Management - Real-Time Constraints in Database Transaction Systems (Hardcover, 1996 ed.)
Series: Advances in Database Systems, 2
Expected to ship within 10 - 15 working days
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Transaction processing is an established technique for the
concurrent and fault tolerant access of persistent data. While this
technique has been successful in standard database systems, factors
such as time-critical applications, emerg ing technologies, and a
re-examination of existing systems suggest that the performance,
functionality and applicability of transactions may be substan
tially enhanced if temporal considerations are taken into account.
That is, transactions should not only execute in a "legal" (i.e.,
logically correct) man ner, but they should meet certain
constraints with regard to their invocation and completion times.
Typically, these logical and temporal constraints are
application-dependent, and we address some fundamental issues for
the man agement of transactions in the presence of such
constraints. Our model for transaction-processing is based on
extensions to established mod els, and we briefly outline how
logical and temporal constraints may be ex pressed in it. For
scheduling the transactions, we describe how legal schedules differ
from one another in terms of meeting the temporal constraints.
Exist ing scheduling mechanisms do not differentiate among legal
schedules, and are thereby inadequate with regard to meeting
temporal constraints. This provides the basis for seeking
scheduling strategies that attempt to meet the temporal constraints
while continuing to produce legal schedules."
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