Performance modelling of asynchronous replica distribution technique on distributed database systems

• Main Authors: Zarina, Mohamad, Aznida Hayati, Zakaria@Mohamad, Wan Suryani, Wan Awang
• Format: Article
• Language: English
• Published: 2007
• Subjects: QA75 Electronic computers. Computer science
• Online Access: http://eprints.unisza.edu.my/2742/1/FH02-FIK-18-17495.jpg; http://eprints.unisza.edu.my/2742/

In distributed database systems, replication is the most widely used approach to offering high data availability, increased fault tolerance, and improved scalability of the overall system . However, the primary concern with this technique is not only to provide high availability and reliability but also to boost the performance of data replication, i.e. to minimize response time an d maximize through put. We propose an analytical model for asynchronous replication technique (ART) by copying the data an d replicating it to remote sites on a continuous basis. A remote copy of the data is created at a subsequent time after the primary copy is updated. The model is based on the M/G/1 queuing system by taking into account intersite communication between sites in the systems.