A Survey of Dynamic Replication Strategies in Distributed Systems

In today’s world, effective management and quick retrieval of data is an important issue. It is very challenging task to provide maximum data availability and fault tolerant data access in the distributed systems as it scales over different geographical areas. To handle this issue data has to be replicated on large number of different sites. Data replication is a practical and effective method to enhance the performance and reliability in distributed systems by making multiple copies of same data. In this paper a study is conducted to examine already proposed data replication techniques in distributed systems and we found that replication techniques are designed based on various parameters such as availability, scalability, bandwidth consumption, access time and fault tolerance etc. A comparison has been done between different replication strategies based on different parameters. The paper also discusses future work in the area of replication in the distributed systems