HP-UX System Administrator's Guide: Overview

HP SMH
(System
Management
Homepage)
The primary single system administration tool beginning with HP-UX 11i version 3. HP SMH
supports HP-UX, HP supported versions of Linux, and Microsoft Windows operating systems.
iCAP (Instant Capacity) A group of technologies that allow you to activate/deactivate pre-purchased
“stand-by” hardware components, paying only for the computing resources you actually consume.
This allows you to handle temporary usage demands more cost efficiently.
iCAP
components
Components (for example, processing cores and memory), purchased at a reduced price, but
without usage rights. These components can be activated when needed by purchasing either
temporary or permanent usage rights.
Installed
Product
Database
A database of software currently installed on a server, created and maintained by the Software
Distributor suite of utilities. See “Software Distributor (SD)” (page 123).
Integrity VM
guest
An instance of HP-UX running within an Integrity virtual machine.
interleaved
swap
Swap space spanning multiple physical devices for read/write efficiency, similar to disk striping.
See also disk striping.
JBOD An acronym meaning Just a Bunch of Disks and representing a group of disk devices concatenated
together to be treated as though they were a single large device.
kernel The nucleus of the HP-UX operating system. Comprised of drivers and other code modules, the
kernel centrally controls nearly all of the essential functions of an operating system (for example,
memory management, communication between hardware and software, and process scheduling).
kernel
modules
Modular chunks of code that collectively make up the kernel. Some modules require a reboot in
order to be added to (or removed from) a kernel, others do not.
kernel
tunables
Variables within the kernel that govern various kernel functions (for example, how many processes
can simultaneously exist, or how physical memory is allocated). By altering the values of these
variables the kernel’s behavior can be influenced (“tuned”).
lazy swap When a process is scheduled, enough swap space is usually reserved just in case the process needs
to be paged out of physical memory to make room for other running processes.
Often, swap space is reserved but never used because the process it was reserved for did not get
paged out, or only portions of it did. This results in wasted swap space. When enabled, lazy swap
causes swap space to be reserved at the time memory contents for a process are actually paged out,
rather than when the process is scheduled, yielding more efficient swap space utilization.
Legacy View A view of the I/O device tree using physical hardware path addresses and legacy device special
files.
See also Agile View.
line printer
spooling
system
An HP-UX subsystem used to control the flow of printing in order to:
prevent intermixed listings•
• prioritize print jobs
• control who can use specific printers
• allow for printer maintenance
• group printers to associate them with a single print queue (See “printer class”)
local printer A printer that is physically attached to a server and directly controlled by the Line Printer Spooling
System of an HP-UX instance running on that server.
138 Glossary