ServerNet Cluster 6780 Planning and Installation Guide (G06.28+, H06.05+)

Glossary
ServerNet Cluster 6780 Planning and Installation Guide—527301-005
Glossary-20
process
process. A program that has been submitted to the operating system for execution, or a
program that is currently running in the computer.
process ID. A number that uniquely identifies a process. It consists of the processor (CPU)
number and the process identification number (PIN).
process identification number (PIN). A number that uniquely identifies a process running
in a processor. The same number can exist in other processors in the same system.
See also process ID.
processor. (1) A functional unit of a computer that reads program instructions, moves data
between processor memory and the input/output controllers, and performs arithmetic
operations. Processors are sometimes referred to as central processing units (CPUs),
but a NonStop system has multiple cooperating processors rather than a single CPU.
(2) One or more computer chips, typically mounted on a logic board, that are designed
to perform data processing or to manage a particular aspect of computer operations.
See also central processing unit (CPU).
processor enclosure. A NonStop S-series system enclosure containing one group, which
includes processors, ServerNet adapters, disk drives, components related to the
ServerNet fabrics, and components related to electrical power and cooling for the
enclosure.
processor multifunction (PMF) CRU. (1) A NonStop S-series customer-replaceable unit
(CRU) that contains a power supply, service processor (SP), ServerNet router 1,
Ethernet controller, three ServerNet addressable controllers (SACs), and a processor
and memory system in a single unit. The PMF CRU consists of three subassemblies:
the processor and memory board (PMB), the multifunction I/O board (MFIOB), and the
power supply subassembly. (2) A collective term for both PMF CRUs and PMF 2
CRUs when a distinction between the two types of CRUs is not required.
product module (PM). The part of the Subsystem Control Facility (SCF) subsystem that is
responsible for subsystem-specific command processing.
public LAN. A local area network (LAN) connected to the Ethernet ports on an Ethernet 4
ServerNet adapter (E4SA). Unlike a dedicated LAN, a public LAN supports the
connection of many types of servers and workstations. System consoles can be
connected to a public LAN, but such system consoles cannot use all the OSM
applications.
radio frequency interference (RFI). Forms of conducted or radiated interference that might
appear in a facility as either normal or common-mode signals. The frequency of the
interference can range from the kilohertz to gigahertz range. However, the most
troublesome interference signals are usually found in the kilohertz to low megahertz
range. At present, the terms radio frequency interference and electromagnetic
interference (EMI) are usually used interchangeably.
remote interprocessor communication (RIPC). The exchange of messages between
processors in different systems or nodes.