GLYPH<SM590000> Currently not running on IBM Z servers: 

– No IBM Z skills 

– Want to implement cloud 

– Have expectations that are acquired fromanother hypervisors’ management, such as VMware, KVM, and Citrix 

## E.3 DPM overview 

Traditional IBM Z servers are highly virtualized with the goal of maximizing the use of compute (processor and memory) and I/O (storage and network) resources, and simultaneously lowering the total amount of resources needed for workloads. For decades, virtualization was embedded in the IBM Z architecture and built into the hardware and firmware. 

Virtualization requires a hypervisor, which manages resources that are required for multiple independent virtual machines. The IBM Z hardware hypervisor is known as IBM Processor Resource/Systems Manager (PR/SM). PR/SM is implemented in firmware as part of the base system. It fully virtualizes the system resources, and does not require extra software to run. 

PR/SM allows the defining and managing of subsets of the IBM Z resources in LPARs. The LPAR definitions include several logical processing units (LPUs), memory, and I/O resources. LPARs can be added, modified, activated, or deactivated in IBM Z platforms by using the traditional Hardware Management Console (HMC) interface. 

DPM uses all its capabilities as the foundation for the new user experience. In addition to these capabilities, DPM provides an HMC user interface that allows customers to define, implement, and run Linux partitions without requiring deep knowledge of the underlying IBM Z infrastructure management; for example, input/output configuration program (IOCP) or hardware configuration definition (HCD). 

