TRANSACTION PROCESSING FOR TRANSACTION PROCESSING FOR DISTRIBUTED REAL TIME DATABASE SYSTEM

Abstract

The Transaction processing systems provide a predictable response to a predictable request within an acceptable time; it ensures that all the participating sites agree on the final outcome (commit or abort) of the transaction. Real Time Database (RTDB) System can be viewed as an amalgamation of a conventional Database Management System (DBMS) and real time system. The work in this dissertation has been done in the context of real-time application than impose “firm deadline” for transaction completion. There are several factors that contribute to the difficulty in the transaction deadline. One of the major factors is the data conflict between executing-committing-transaction. This data conflict introduces the dependency between the transactions. Due to this dependency the dependent transaction wait for the subordinate transaction to commit in order to maintain the ACID semantics in the distributed data. Since the duration of the commit phase is unpredictable due to delay in communicati...