Dynamic Clustering Model for High Service Availability

Current clustering solutions highly depend on pre-configuration by human administrators. However, these clustering solutions are not suitable for the mobile environment because the clustering configuration can be changed as the movement of the server participated in the cluster. Also, when discussing serviceability with the aspect of the quality of services, pre-configured clusters have some defects. If a process of configuration for clusters can be automated, these problems can be solved. With the self-configuration scheme, servers on a network can make clusters dynamically at any time. Any server participating in the cluster can assign its hot standby backup and can also be a backup for another server so that they can provide better services to clients. However, for making the cluster dynamically, the security issue should be considered. For realizing this scheme, the server agent and service description server, called SDS, are designed and implemented. For the security issue, a simple and lightweight authentication approach using DNS server is designed. For watching the state of the overall system, a web-based monitoring tool is also implemented