In order to encounter the inherent problems of centralized data center and distributed data center are developed in which the first central manger decides which data center be served this request and sends it to local manager to see where it is going to deployed. Accordingly, the local manager selects the physical machine in the data center which will be responsible to run that virtual machine. It is highly beneficial in such cases to reduce network capacity needs for high bandwidth applications which in turn also reduce the latency of access. This book addresses the distributed data center geographically wide spread, interconnected and also fully automated with high speed and low latency network hence providing a distributed set of machines running at multiple locations, connected to a single network. As a matter of fact load balancing redesigns the system overload for better performance and to meet highest level of user satisfaction reduce cost and time.