a. Consider a cluster of servers costing $2000 each. Assuming an annual failure rate of 5%, an average of an hour of service time per repair, and replacement parts requiring 10% of the system cost per failure, what is the annual maintenance cost per server? Assume an hourly rate of $100 per hour for a service technician.

b. Comment on the differences between this manageability model versus that in a traditional enterprise datacenter with a large number of small or medium-sized applications each running on its own dedicated hardware infrastructure.

c. Discuss the trade-offs in having heterogeneous machines in a warehouse-scale computer.