Transaction Management in Homogenous Distributed Real-Time Grid Database Systems
Abstract
Distributed processing systems incorporating fully replicated databases are inherently more reliable
than systems having partitioned and partially replicated databases. Since every site has a complete copy of the
database, greater system functional integrity is provided in the event of network partitions. A network partition
can occur when a break occurs in the communication medium isolating one or more processor sites. In addition to
the greater reliability, there is a reduction in the associated control required. There is no need for the complicated
mechanisms for maintaining owners (the primary data copy) and an acceptable number of subscriber copies
(secondary copies or replications) of each database partition. There is also an improvement in performance
obtainable from the use of local copies of data at each site. Faster access memory systems and higher speed
communications improve performance of both partially and fully replicated database systems. However, potential
improvements in performance can only be achieved by using update algorithms which require significantly less
inter-site communication. An example of a homogeneous distributed processing system architecture incorporating
a fully replicated database system. A homogenous distributed real time replicated database system is a network of
two or more DBMS that reside on one or more machines. A distributed system that connects two or more
databases are Homogenous Distributed Database Systems (HDDBS) create different problems when accessing
distributed and replicated databases. Particularly, access control and transaction management in HDDBS require
different mechanism to monitor data retrieval and update to databases. Current trends in multi-tier client/server
networks make DDBS an appropriated solution to provide access to and control over localized databases. This
paper highlights the basic concepts underlying distributed database system including transaction management in
in HDRTDBS.
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