HP-UX 11i December 2006 Release Notes

Introduction to HP-UX 11i Version 1
Welcome to HP-UX 11i v1 December 2006
Chapter 2
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Welcome to HP-UX 11i v1 December 2006
With HP-UX 11i, HP delivers a highly available, secure, and manageable operating
system that meets the demands of end-to-end Internet-critical computing. HP-UX 11i
supports enterprise, mission-critical, and technical computing environments. HP-UX 11i
versions 1 and 2 are available on PA-RISC systems and HP-UX 11i version 2 is available
on Itanium-based systems.
HP-UX 11i v1 provides new hardware enablement, additional software functionality, and
various HP-UX applications bundled into Operating Environments: integrated and
tested software solutions containing the operating system and selected applications.
The performance of HP servers and applications with the HP-UX 11i v1 Operating
Environments is as good or better as compared to HP-UX 11.0 installed in the same
configuration. It must be kept in mind, however, that in the vast majority of cases,
HP-UX is likely to be installed as part of one of the predefined HP-UX 11i Operating
Environments.
The HP-UX 11i v1 Operating Environments provide numerous benefits, including lower
cost as well as simplification of product ordering, installation, integration, and support.
While the HP-UX 11i v1 Operating Environments provide these desirable benefits, they
all involve more software components and daemons than a base HP-UX 11.0 or HP-UX
11i operating system. Because of this, an Operating Environment may have somewhat
greater system overhead compared to a base operating system installation. This increase
in system overhead, while modest, can nevertheless make it erroneously appear that
system and application performance are degraded with HP-UX 11i v1 as compared to
HP-UX 11.0. In fact, performance with HP-UX 11i v1 is generally better than HP-UX
11.0 when the software configurations are the same.
While not recommended, one of the options for installing HP-UX 11i v1 is as a base
operating system only, without an Operating Environment. Installing HP-UX 11i v1 as a
base operating system will give the greatest performance and the lowest system
overhead but eliminates the advantages provided by the HP-UX 11i Operating
Environments.
For more information on the Operating Environments, see “HP-UX 11i v1 Operating
Environments” on page 27.
For information on disk and memory requirements, consult the HP-UX 11i Installation
and Update Guide, available in the media kit, on the Instant Information media, and at
the HP Documentation Web site at http://docs.hp.com/en/oshpux11i.html.