The Design of a New Virtualization-Based Server Cluster System Targeting for Ubiquitous IT Systems

To meet the demand for seamless real-time services with limited resources of ubiquitous computing environments, this paper suggests a new virtualization-based server cluster system introducing three schemes: simplified rotation process to reduce system overhead, exposure time adjustment to prevent the degradation of system performance, and spare server insertion to cope with heavy incoming packets. It is verified for ubiquitous computing systems which should satisfy strict operational constraints with limited resources that the proposed schemes enable the systems to achieve higher levels of service quality as well as to stand up to distributed denial of service (DDoS) attacks.