An offline program that
is invoked to (1) compute the file address associated with a specific ordinal
number and record type, or (2) print all computable file addresses with a
specific version of the FACE table.
FACE table (FCTB)
The main storage resident
table used by the FACE program to calculate the address associated with a
specific record type and ordinal number on fixed file storage.
FACE table generator
The offline module used
to create the FACE table and other associated macros.
fallback
The E-type loader process of
discontinuing the use of newly loaded programs and using the most recently
activated version of the programs. See also deactivate
function.
FANR field
Forward automatic network routing
field.
FARF
File address reference format.
FARF3
A device-independent file addressing
scheme used by the TPF system. FARF3 means file address reference
format 3.
FARF4
A device-independent file addressing
scheme that utilizes format type indicator (FTI) and universal format type
(UFT) combinations allowing up to 1G (230) addresses. FARF4
means file address reference format 4.
FARF5
A device-independent file addressing
scheme that uses format type indicator (FTI) and universal format type (UFT)
combinations allowing up to 4G (232) addresses. FARF5 means
file address reference format 5.
FARF6
A device-independent file addressing
scheme that uses format type indicator (FTI) and universal format type (UFT)
combinations allowing up to 64-petabyte (256) addresses.
FARF6 means file address reference format 6.
FARW
File address reference word.
fast write
In 3990 caching control units, a
write operation at cache speed that does not require immediate transfer of
data to DASD. The data is written directly to cache, or to both cache
and nonvolatile storage, and is available for later destaging.
FCT
Frame control table.
FCTB
FACE table.
FCTBG
FACE table generator.
FDOCA
Formatted Data Object Content
Architecture provides data with a descriptor relevant to the data type and its
representation.
FDT
File descriptor table.
FID
Format identification.
FIFO
First-in-first-out.
FIFO special file A type of file with the
property that data written to such a file is read on a first-in-first-out
format. (POSIX.1)
A named permanent pipe that allows two or more unrelated processes to
exchange information through a pipe connection. Synonymous with
named pipe.
file
A collection of data that is stored and
retrieved by an assigned name.
file address compute (FACE) program
The
system program that converts a fixed record type and ordinal number into a
file address that can be used to retrieve the record.
file address reference format (FARF)
The
generic term for the TPF file address reference format, of which there have
been several; for example, FARF3, FARF4, FARF5, and FARF6.
file address reference word (FARW)
An 8-byte
field in the entry control block (ECB) that is used to pass a file address
reference between application and system programs. Every ECB has 16
FARWs, one for each data level. Additional FARWs are available by using
data event control blocks (DECBs). DECBs contain 12-byte FARW fields
that hold 8-byte file addresses.
file capture
See capture.
file collector
The data collection program
that records (1) tape activity and (2) traffic between programs and the data
stored in VFA, main storage, or disk files. This data is recorded on
the data collection RTC tape for offline data reduction and analysis.
file creation mask
An object whose bits are
used to prevent access permissions of a new file from being set when a file is
created. If a bit is set in the file creation mask, the corresponding
bit in the access permissions cannot be set. If a bit is not set in the
file creation mask, the corresponding bit in the access permissions can be
set.
file descriptor
In the TPF file system, a
nonnegative integer used to identify a file. A file descriptor is
created by opening a TPF file system file. See also standard
error (stderr), standard input (stdin),
standard output (stdout). See also socket
descriptor.
file descriptor table (FDT)
A control block
structure located in main storage in the TPF system that contains status
information about each socket descriptor obtained by TCP/IP offload support
through socket and accept function calls. A
control block structure located in main storage in the TPF system that
contains status information about each file descriptor obtained by opening a
TPF file system file.
file handle
Any identifier of a file, such
as a path name or file descriptor.
file lock
A means to inform a process that
another process has access to a file.
file mode
An object containing the file
permission bits and other characteristics of a file. (POSIX.1)
file mode creation mask
See file
creation mask.
file name
(1) A name consisting of 1 to
NAME_MAX bytes used to name a file. The characters composing the name
may be selected from the set of all character values excluding the slash
character (/) and the null character. The file names dot (.) and
dot-dot (..) have special meaning. Synonymous with
path name component. See also dot (.),
dot-dot (..). (POSIX.1) The final
component of a path name. The file identifier stored in a directory
entry. (2) The name used to identify a file.
file offset
The byte position in the file
where the next input/output (I/O) operation begins. Each open file
description associated with a regular file, block special file, or directory
has a file offset.
file owner
The owner of a file as identified
by the user ID (UID).
file permission bits
Information about a
file that is used, along with other information, to determine if a process has
read, write, or search permission to a file. The bits are divided into
three parts: owner, group, and other. These bits are contained in
the file mode. (POSIX.1)
file position indicator
Synonymous with
file offset.
file recoup
See recoup.
file resident program
An ECB-controlled
program that resides on file and is brought into main storage for online
processing.
file restore
See restore.
file status table (FSTB)
See module
file status table (MFST).
file system
A collection of files and
directories. The collection of files and file management structures on
a physical or logical mass storage device, such as a disk or disk
partition. A single device can contain several file systems. A
collection of files and some of their attributes.
File Transfer Protocol (FTP)
In Transmission
Control Protocol/Internet Protocol (TCP/IP), an application protocol used for
transferring files to and from host computers. FTP requires a user ID
and possibly a password to allow access to files on a remote host
system. FTP assumes that the Transmission Control Protocol (TCP) is the
underlying protocol.
finite state machine (FSM)
A component of
the TPF/APPC support that controls the sequence of verbs issued for a
conversation.
first-in-first-out (FIFO)
A queuing
technique in which the next item to be retrieved is the item that has been in
the queue for the longest time. (A)
fixed file records
Data records that are
permanently assigned to specific functions (record types) and are accessed
through the FACE/FACS programs, which use the FACE table.
fixed keypoint area
The area on each online
module containing all the working records required to initialize the
system.
fixed record
A variation of fixed file
record.
fixed record type
The records associated
with a set of data. The symbolic name given to the records associated
with a set of data.
fixed storage
Refers to those areas of main
storage in which sizes are determined at system generation. (In
previous versions of the TPF system, this was known as permanent
core). Contrast with working storage.
float constant
A constant representing a
non-integral number.
FMMR
Functional management message
router.
format identification (FID) field
The field
in an SNA path information unit (PIU) that is used to identify the format in
which the PIU was encoded.
format type indicator (FTI)
A variable-sized
bit field in FARF4, FARF5, and FARF6 address formats. See
universal format type.
Formatted Data Object Content Architecture (FDOCA)
An
architecture that provides data with a descriptor relevant to the data type
and its representation.
forward automatic network routing (FANR) field
A
list of automatic network routing (ANR) labels that represent the path from
one rapid transport protocol (RTP) endpoint to another for an RTP
connection.
frame
A 4K (KB) unit of real memory that
corresponds to a page. It does not have a format flag and is not a TPF
block.
frame control table (FCT)
In virtual
storage, 128-, 381-, 1055-, and 4095-byte working storage blocks are allocated
from a single pool of 4K frames. The frame control table keeps track of
which frames are in use, how blocks are allocated in each frame, and which of
the blocks in each frame are in use.
fresh load
The part of restart that is
activated on the first IPL, after a load of the SNA pilot tape, or upon
failure of a nonfresh load. Various SNA tables are reloaded and
reinitialized. Contrast with nonfresh load.
front-end processor
A TPF system attached to
the data communications network. The front-end processor routes some or
all input messages to other front-end, back-end, or non-TPF systems; it
may perform some message recovery processing, typically has few DASD, does
little I/O, and maintains short path lengths. In addition, a front-end
processor has limited requirements for a database. Contrast with
back-end processor.
FSC
Functional support console.
FSM
Finite state machine.
FSTB
See module file status table
(MFST).
FTI
Format type indicator.
FTP
File Transfer Protocol.
full load
A software load where every system
component is loaded.
full scale
In program test vehicle (PTV), a
gradient of program testing that allows multithread testing with simulation of
the full environment in which the application programs operate. Also
see package unit and transaction unit.
full-duplex
In data communication, a mode in
which data can be sent and received at the same time.
fully duplicated file
A database where all
fixed and pool records are duplicated across modules. Contrast with
selectively duplicated files and nonduplicated
files.
function
A named group of statements that
can be invoked and evaluated and may can return a value to the calling
statement.
functional message
See
command.
function declarator
The part of a function
definition that names the function, provides additional information about the
return value of the function, and lists the function parameters.
function definition
The complete description
of a function. A function definition contains an optional storage class
specifier, an optional type specifier, a function declarator, optional
parameter declarations, and a block statement (the function body).
function descriptor
An internal control
block that contains the function address and its associated writable static
area (WSA). In the TPF system, a function descriptor can be thought of
as a dynamic linkage call stub in contrast to the static linkage call stubs
that are generated offline by the dynamic load module (DLM) stub generator
tool (STUB) and the library interface tool (LIBI) before link-edit
time.
function management message router (FMMR)
A
system facility used to forward messages to remote TPF hosts.
functional support console (FSC)
CRAS
terminals designated to receive messages related to a specific function;
sometimes called a functional CRAS console.