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Large-scale systems such as Grids offer infrastructures for both data distribution and parallel processing. The use of Grid infrastructures is a more recent issue that is already impacting the Distributed Database Management System industry. In DBMS, distributed query processing has emerged as a fundamental technique for ensuring high performance in distributed databases. Database placement is ...

Distributed database systems require a commit process to preserve the ACID property of transactions executed on a number of system sites. With the appearance of main memory database system, the database processing time has been reduced in the order of magnitude, since the database access does not incur any disk access at all. However, when it comes to distributed main memory database systems, t...

The efficiency and effectiveness of a distributed database depend primarily on solving two interrelated design problems: data allocation, specifying what data to replicate and where to store it, and operating strategies, specifying where and how retrieval and update processes are performed. We develop a distributed database design approach that comprehensively addresses these problems, explicit...

This paper reviews the security issues and concurrency control in distributed database system. In this paper we have concerned about the features of distributed database system and its security issues. Distributed database is a collection of databases that can be stored at different computer network sites. This paper provides various aspects like fragmentation, types of fragmentation, replicati...