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Performance evaluation of web servers using central load balancing policy over virtual machines on cloud

Cloud Computing adds more power to the existing Internet technologies. Virtualization harnesses the power of the existing infrastructure and resources. With virtualization we can simultaneously run multiple instances of different commodity operating systems. Since we have limited processors and jobs work in concurrent fashion, overload situations can occur. Things become even more challenging in distributed environment. We propose Central Load Balancing Policy for Virtual Machines (CLBVM) to balance the load evenly in a distributed virtual machine/cloud computing environment. This work tries to compare the performance of web servers based on our CLBVM policy and independent virtual machine(VM) running on a single physical server using Xen Virtualizaion. The paper discusses the efficacy and feasibility of using this kind of policy for overall performance improvement.