If you accept that virtualization is about consolidating and simplifying, then the fewer servers you need the better. Ten servers are better than 40, six are better than 10, two is better than six. All of your company or department's vital applications and data operate independently as virtual machines, yet efficiently use just one set of hardware resources.
Improving service levels for critical applications is a major concern of IT. Nowhere is that more evident than in efforts to support Web-based applications, which can be both mission-critical and complex. Since many IT organizations have implemented a Service Oriented Architecture (SOA), Web-based applications have skyrocketed in popularity and complexity.
For those of you that are missing the Microsoft basics it would be beneficial to set the stage. Right now Microsoft is shipping the first version of their hypervisor (Hyper-V) by means of two different "channels". The first one is as a component (or role) of their Microsoft Windows Server 2008 products. You can enable or disable this role in either a normal (GUI based) Windows Server 2008 install or a core (Gui-less) Windows Server 2008 install.
Enterprises have come full circle. In the 1990s, data center computing gave way to distributed computing. Distributed computing has now given way to consolidating resources back to the data center via virtualization. However, as computing resources have become more centralized, users have become increasingly more distributed.
As the number of virtual servers sharing the physical FC HBA ports of a VOE server increase, SAN fan-out is no longer just a switch issue: SAN fan-out becomes a server HBA issue that mandates holistic management of SAN infrastructure from switches to HBAs.
Over the past two years virtualization technologies have firmly taken hold in the data center by proving their value and worth as production capable application and server platforms. This migration has occurred in the enterprise space as companies virtualize their infrastructure from the network through the application stack to storage.