Migration and Cooling Aware Approach for Virtual Machine Spreading in Data Centers

Server virtualization is a way to utilize efficient resources of the data center. One of the challenges faced by data centers is to decide when, how and which Virtual Machine to migrate. In principle, VMs will migrate from one physical host to a different host without inflicting a significant impact on the application running within them. VM selection decision opens up a huge area for researchers. VM migration cost plays a very important role in the VM selection because it directly depends upon VM performance. R. Ayoub et al. have proposed GentelCool algorithm. The proposed a policy based on GentelCool algorithm which includes VM migration cost. The proposed policy for VM Level spreading considers the migration cost and cooling cost. From the simulation results of existing and proposed VM Level spreading policy conclude that proposed VM level spreading policy provides a higher lead to terms of SLATAH, PDM and SLAV. The improvement in SLTAH is because of swapping of hot VM with colder VM, whereas the improvement in PDM is because of consideration of migration cost with cooling cost.