Object Replication On-Demand in DDBMS for Load Balance Cluster for SCI 2001 / ISAS 2001

摘要

In recent years a significant growth of network traffic and processing load, mainly in database servers, was verified. Many factors have been responsible for this growth, as we may see from multimedia application, e.g.: growth of on demand information availability, and increase of both the size and quantity of stored information. A solution for the problem of processing large volumes of information is the use of cluster based servers working together with distributed database systems. This type of solution allows for parallel manipulation of great quantities of information. Although multiprocessing in clusters systems is in fact being used more and more due to high performance low cost and high scalability characteristics, we verified that specific database systems for these architectures present some restrictions in relation to data replication, and load balance. The main objective of this work is the study and implementation of a mechanism that allows better cluster load balance during the periods of high information demand. This mechanism replicates the most requested object in a Multimedia Distributed Database Management System (DDBMS). The complete copy generation process is autonomous and it uses dynamic distribution of replicas for idle or less loaded nodes.