Implementation of Client-Centric Consistency Control and Synchronization System For Distributed Replication(For Mobile Clients)

Abstract

Distributed System is a collection of independent computers that appears to its users as a single coherent system. Distributed processing has become more and more important and attractive with progress in the areas of computer networks and distributed system. A consistency model is a contract between processes and data store. If processes agree to obey certain rules, the data store promises to work correctly. Normally, a process that performs a read operation on a data item, expects the operation to return a value that shows the results of the last write operation on that data. In the absence of a global clock, it is difficult to define precisely which write operation is the last one. This leads to a range of consistency models. This paper intends to develop client-centric consistency model by using monotonicwrite consistency control and vector clock time synchronization algorithm.