Guardian User's Guide

Glossary
Guardian User’s Guide—425266-001
Glossary-6
input/output (I/O)
input/output (I/O). (1) Data entered into a computer or transmitted out of a computer. (2)
The process of entering data into or transmitting data out of a computer.
input/output process (IOP). A running program (part of the operating system) that manages
the I/O functions for one or more ServerNet addressable controllers (SACs) of the same
type.
input source. The resource from which Subsystem Control Facility (SCF) accepts command
input. SCF can accept input from a terminal or a disk file. The initial input source is
determined by the form of the RUN command used to initiate SCF. At any time during
an SCF session, the input source can be temporarily changed to execute a series of
commands from a command file.
International Tandem Users’ Group (ITUG). An independent organization of NonStop™
Kernel users that encourages communication and information exchange, establishes a
forum for special interest groups, and provides feedback to Compaq regarding users’
needs.
internet protocol (IP). A data communications protocol that handles the routing of data
through a network, which typically consists of many different subnetworks. IP is
connectionless; it routes data from a source address to a destination address. See IP
address.
IOP. See input/output process (IOP)
.
IP. See internet protocol (IP)
.
IP address. An internet protocol (IP) address. An IP address consists of two parts: a network
address, which identifies the network, and a local address, which identifies a host within
a network. A network address is concatenated with a host address to form the IP address
and uniquely identify a host within a network. IP routes data between source and
destination IP addresses.
ITUG. See International Tandem Users’ Group (ITUG).
Kernel-Managed Swap Facility (KMSF). A facility for managing virtual memory.
Through KMSF, the NonStop™ Kernel opens one or more swap files for each processor
and manages the files for all the processes needing them. KMSF receives requests for
swap space from the NonStop™ Kernel, and returns swap-space reservations to the
Kernel. Processes swap to the kernel-managed swap files as needed. As a process’s need
for swap space grows, KMSF increases the amount of swap space reserved for the
process. When the process no longer needs the space, it is returned to KMSF. See
NSKCOM
.
KMSF. See Kernel-Managed Swap Facility (KMSF)
.
labeled tape processing. The general term used for an operations environment that uses
labeled tapes, as opposed to unlabeled tapes, for backups of data and other operations
tasks and activities.