Dynamic Replication Management Mechanism Based on Accessing Frequency Detecting

The system describes replication management policies in distributed file system,and shows a decentralized dynamic replication management mechanism dependent onaccessing frequency detecting named FDRM (Frequency Detecting ReplicationManagement). In FDRM, system nodes scan their local replicas to monitor replicas’access pattern, and make decision independently to add, delete or migrate replicas. Inaddition, the scanning interval of a replica is variable according to the accessingfrequency to that replica, which make FDRM more sensitive to the change of systembehaviors.The proposed system consists of three sites (site 1, site 2 and site 3). This systemis implemented in a distributed manner and each site stored their own documents. Thereare two types of users in this system. They are administrator and end users. Each site hasmany registered users and administrator can create new user for each site. Users read orwrite documents and record the number of read or write documents at the respective sitecounter. After the interval of periodicity, FDRM checks the sites’ counters and decideindependently adding or deleting the replica for each site. This system is implementedusing by C# programming language with Microsoft SQL Server (MSqlServer) database