You can use the resources on and connected to the SPARC M8 servers and SPARC M7 servers to create virtualized environments with logical domains using the Oracle VM Server for SPARC software. With the logical domains technology, you can create entire data center tiers within a single server. Securely isolated from one another, logical domains are able to virtualize the various resources of the platform (for example, I/O, CPU, memory, and storage resources) with the flexibility to change resource amounts and configurations on demand. To create these environments, you must understand the physical architecture of the server and how it is mapped to the logical software level. These topics describe the mapping and how to use that information to create virtualized environments.