© Copyright IBM Corp. 2005. All rights reserved. 57Chapter 3. POWER5 virtualizationcapabilitiesVirtualization is a critical component in the on demand operating environment,and the system technologies implemented in the POWER5 processor-based IBMSserver p5 servers provide a significant advancement in the implementation offunctions required for operating in this environment. IBM virtualizationinnovations on the p5-590 and p5-595 provide industry-unique utilizationcapabilities for a more responsive, flexible, and simplified infrastructure.Advanced POWER Virtualization is a no-charge feature (FC 7992) on the p5-590and p5-595 systems. On other Sserver p5 systems, it is a priced feature.The Advanced POWER Virtualization feature provides the foundation ofPOWER5 virtualization technology. In this chapter we introduce the VirtualizationEngine and associated features, including Micro-Partitioning, shared processorpool, Virtual I/O Server (disk and LAN), and the Partition Load Manager for AIX5L logical partitions.3