Zongfen Han

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—Virtual machine technology can enhance server utilization and consolidation on an individual physical machine. In a growing number of contexts, many of which require high-performance networking inside of the system. Unfortunately, the development of virtualization technology is inclined to application isolation as yet, leads high communication overheads(More)
Some works have been done in addressing real-time fault-tolerant scheduling algorithms. However, they all based on homogeneous distributed systems or multiprocessor systems, which have identical processors. This paper presents two fault-tolerant scheduling algorithms, RTFTNO and RTFTRC, for periodic real-time tasks in heterogeneous distributed systems.(More)
— Workflows are often used to represent enterprise-type activities, and authorisation control is an important security consideration in enterprise-level applications. Role-Based Access Control (RBAC) is a popular authorisation control scheme under which users are assigned to certain roles, and the roles are associated with permissions. This paper presents a(More)
Resource discovery is a basic service in grid computing : gives a description of resources desired and finds the available one to match the description. In computational grid, how to discover resources efficiently has become a crucial factor to evaluate the performance in the whole system. In this paper, we present a bid-based resource discovery algorithm,(More)