Using Ideal Time Horizon for Energy Cost Determination


In most optimal VM placement algorithms, the first step to determine the proper time horizon, Tfor the prediction of the expected maximum future load, L. However, T is dependent on the proper knowledge of therequired time for servers to switch from their initial SLEEP/ACTIVE state to the next desired state. The activitiesimplemented by this policy are (a) to relocate the VM from an encumbered server, a server that operates in anundesirably high regime with applications forecasted to rise their burdens to compute in the subsequent reallocationcycles; (b) to conduct VM migration from servers that operate within the undesirable regime to shift the server toa SLEEP mode; (c) putting an idle server to SLEEP mode and rebooting the servers from the SLEEP mode at highcluster loads. A novel mechanism for forwarding arriving client desires to the utmost suitable server is implemented;thus, in the complete system, balancing the requested load is possible