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Introduction

Integrity servers help to meet your business needs by allowing you to consolidate multiple

applications onto a single server using a combination of HP-UX 11i Partitioning Continuum and

Virtual Server Environment (VSE) technologies. The partitioning techniques, which you can use

alone or in combination, include hard partitions, virtual partitions, virtual machines, and resource

partitions.

" Hard partitions (nPartitions) offer electrical isolation and cell board granularity, allowing you

to service one partition while others are online.

" Virtual partitions (vPars) are separate operating system instances on the same nPartition or

server, with O/S, application, and resource isolation. HP-UX 11i Virtual Partitions enable you to

dynamically move CPU power between vPars as workload requirements change. vPars also

offers single CPU core granularity.

" Virtual machines have their own separate operating system instances (guests), on the same

nPartition or server, with different OS versions, applications, and users, in a fully isolated

environment. HP Integrity Virtual Machines software provides shared CPU (with sub-CPU

granularity), shared I/O, and dynamic CPU resource allocation based on demand and

entitlement.

" Resource partitions allocate resources to specific applications and users within an operating

system. They offer fully dynamic allocation of resources, including CPU or sub-CPU and percent

memory granularity.

HP partitioning is regularly used in IT consolidation to isolate production environments from test and

development environments. HP partitioning and VSE can:

" Improve your RoIT through optimized server utilization with minimal overhead.

" Increase server flexibility through easy resizing of partitions.

" Reduce risks by offering a variety of isolation choices, including hard partitions, virtual partitions,

virtual machines, and resource partitions.

" Improve service levels, such as application response time, through the intelligent policy engine

(HP-UX Global Workload Manager), which provides automatic provisioning of resources based

on predefined service level objectives.

Using Integrity Virtual Machines for Hardware

Consolidation

Virtual machines share hardware while providing complete operating system instance isolation, so

the Integrity Virtual Machines (Integrity VM) product is the perfect solution for hardware

consolidation. Using virtualization, you can lower overall hardware costs by:

" Reducing the complexity and number of hardware components required to run multiple operating

system (OS) instances.

" Increasing hardware utilization.