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In a mobile computing environment, clients can access shared data irrespective of their physical location and can be updated by each client independently. This leads to inconsistency of the data. Several concurrency control techniques are proposed in literature to prevent data inconsistency. In this paper, the authors first analyze the existing scheme of concurrency control without locking and justify its performance limitations. A new priority based scheme is proposed in which priority is given to the older transaction whenever conflict arises, thereby decreasing transaction re-executions and current load of the database server.
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