Distributed Real-Time Database system

Computer Engineering

A deadline, which specifies that it must be finished before a certain time in the future, is one way that a transaction's timing restriction is represented. If the deadline is missed in a firm real-time transaction, nothing terrible happens. Even after the deadline has passed, a soft real-time transaction carries some value, but this value usually decreases with time. The major purpose of DRTDBS is to reduce the proportion of transactions cascade rollbacks that miss their deadlines, as opposed to typical databases, where the main goals are to decrease response times and increase throughput. Since the database management techniques for accessing and editing data in DRTDBS need not only assure database consistency but also to satisfy the timing requirements, scheduling real-time transactions is significantly more difficult than regular real-time scheduling. This chapter's objective is to introduce several facets of DRTDBS, the problems, and difficulties they raise, as well as the research is done for this thesis.

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