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Decentralized Global Transaction Management in Multidatabase Systems

This paper discusses the implementation of decentralized global transaction management in the multidatabase system environment without violation of local autonomy. The principal concern of this investigation has been to develop a method of global transaction management that is particularly suited to decentralized multidatabase systems. Global concurrency control and atomic commitment have been approached by allowing the serialization and commitment orders of global sub transactions to be determined at each local site, eliminating the need to transfer local information to the global level. Building upon these concepts, we propose a mechanism which supports a decentralized global transaction management approach, completely circumventing the difficulties posed by central coordination. As multidatabase systems integrate a large number of participating local database systems, a decentralized design is essential to the achievement of a high degree of fault-tolerance.