Cloud computing is the ginormous technology growing now and then. The deficient for space, services, time of usage is totally eradicated with the help of cloud computing. The virtualization helps the users to use the resources in dynamic way with internet. Now-a-days, due to positive oblique in the growth of cloud users, force them to focus on the virtualization migration with the help of virtual machines during the hot spot overload or as cold spot under flow in the server. The utilization of resource, is always not be constant i.e., skew which is varying with time dynamically.