Modern data centers are becoming more and more complex, and there are several reasons for this trend. First, there is a business reason behind any technical enhancement, and lately the paramount business requirement is to shrink as much as possible (the so called “time to market”). People have become used to the quick deploy time provided by virtualization – reducing provision times from weeks and months to days or hours. This has led to the more general concept that any new workload should be immediately available upon request. Cloud-like technologies have further pushed this concept by adding additional elements to the data center such as “infinite scalability” and “self-service.”