Pathway Products Glossary

Glossary
Compaq NonStop™ Pathway Products Glossary—426762-001
Glossary-11
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fault tolerance. The ability of a NonStop™ Himalaya system to continue processing despite
the failure of any single software or hardware component within the system.
field-characteristic clause. In SCREEN COBOL, an ordered set of characters that specify
the characteristics of a screen field.
file identifier (file ID). In the Guardian environment, the portion of a file name following the
subvolume name. In the OSS environment, a portion of the internal information used to
identify a file in the OSS file system. The two identifiers are not comparable.
file name. In the Guardian environment, the set of node name, volume name, subvolume
name, and and file identifier characters that uniquely identifies a file. This name is used
to open a file and thereby provide a connection between the opening process and the
file. See also fully qualified file name
, partially qualified file name, OSS filename, and
OSS pathname.
file-name expansion. The expansion of a partially qualified Guardian file name for a disk file
to include the associated node, volume, and subvolume names.
file system. (1) In the Guardian environment, the application program interface for
communication between a process and a file. A file can be a disk file, a device other
than a disk, or another process. (2) In the OSS environment, a collection of files and file
attributes. A file system provides the namespace for the file serial numbers that uniquely
identify its files.
File Utility Program (FUP). A Compaq product on NonStop™ Himalaya systems that
allows users to create, copy, purge, and otherwise manipulate disk files interactively.
fixed-function terminal. A nonintelligent device (that is, a device without processing ability)
capable of sending and receiving information over communications lines.
Fixed-function terminals are often referred to as dumb terminals.
freeze condition. A condition in which communication between a terminal and a server class
is prohibited. See also thaw condition
.
front-end process. A process, such as the process that accepts the TCP terminal-data stream,
that serves as the intermediary between one system, process, or device and another.
fully qualified file name. The complete name of a file in the Guardian environment. For a
permanent disk file, this consists of a node name (system name), volume name,
subvolume name, and file identifier (file ID). In interactive interfaces such as
PATHCOM and TACL, the parts of a file name are separated by periods. See also
partially qualified file name
.