Dynamic Replication Management Mechanism Based on Accessing Frequency Detecting

Abstract

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