Business Justifications

Enterprise IT centers support many service applications

• Microsoft Exchange
• Oracle
• SAP
• Web servers (eCommerce)
• Citrix
• …

Each service application demands its own environment

• Specific version of operating system
• Multiple processors and disks
• Specialized configurations
• …

Combining services on same server host is difficult (at best)

• Conflicting demands
• Incompatible system OS and application loads
• …

Business Drivers

Upgrading or commissioning a service is very difficult

• Shadow server machines for debugging & testing
• Complicated changeover tactics
• …

Adding or upgrading hardware or OS is difficult

• Testing and refitting active service
• Complicated changeover tactics
• …

Load balancing is impossible

• Services tied to own systems
• Some underused, some overused