Dynamic Load Balancing for Physical Servers in Virtualized Environment

Virtualization technology has brought new vitality to data centers but also brought some thorny issues. Virtualization technology creates an abstract intermediate layer, separating the upper layer applications from the underlying infrastructure, which cause some difficulties to the upper layer applications for the effective use of resources. Based on this observation, we propose a dynamic load balancing system in virtualized environment. The system adjusts the weights of virtual machines in real-time in order to balancing physical servers' load and improve data center efficiency. In addition, by monitoring physical machine failure information, we can evacuate physical machines as soon as they failed to ensure high availability of the data center. We design a virtualized environment monitoring system and propose an efficient algorithm. We evaluate the proposed system with real implementations which show DLB has rather good performance.