HP-UX System Administrator's Guide: Overview

run-level A configuration of system processes. Processes spawned by boot init is assigned to one or more
run-levels. Only processes having an assignment corresponding to the current system run-level
are processed.
SAM (System Administration Manager)
The primary single system administration tool prior to HP-UX 11i version 3. SAM is supported
only the HP-UX operating system.
See also HP SMH (HP System Management Homepage).
secondary
swap
HP-UX begins by paging on a single device only (see primary swap). That way only one device is
needed at boot time. Additional swap areas, known as secondary swap areas, can be subsequently
enabled in order to provide larger amounts of space for paging operations.
selective
dump
A memory dump containing only selected portions of memory. Selective dumps use less disk
space and complete faster than full memory dumps.
server Formerly referred to as a system or a computer. The physical cabinet containing cell boards,
processors, memory, and power supplies.
Service Level
Objectives
Generally a specific, measurable item/objective within a broader, more comprehensive service-level
agreement (SLA) contract.
Serviceguard HP’s product for implementing high availability clusters, alone or together with other products
to form disaster tolerant networks.
See also continental clusters, extended distance clusters, high availability clusters and metropolitan
clusters.
software
depot
An SD-UX format structure that contains one or more software products that can be installed on
other systems or copied to other depots.
software
partitioning
See Virtual Partitions and virtual machine.
software
threading
A parallel computing technique used by applications and operating systems to enhance processing
efficiency.
spooler See line printer spooling system.
stale device
special file
A device special file no longer associated with a valid device. For example, a device file associated
with a device that has been removed from a server.
storage stack The various layers of hardware and software the comprise HP-UX based storage systems. Layers
in the storage stack include:
• Storage Devices (disks, disk arrays, DLT libraries, and so on)
• Drivers to access the storage devices
• Volume Managers (for example, LVM, and VxVM)
• Logical Volumes,
• File systems (for example, HFS, and VxFS)
system Used in this document in two ways:
1. A server or subset of a server (for example, a partition) running an independent
copy of HP-UX.
2. Another type of computer (for example, a PC)
system default
printer
If defined, the system default printer is the print destination that will be used as a print destination
if one is not otherwise specified. See lpadmin(1M) manpage (-d option) for details.
tunables See kernel tunables.
142 Glossary