File Utility Programming (FUP) Reference Manual

Glossary
File Utility Program (FUP) Reference Manual—523323-015
Glossary-2
byte
device to another, or (3) a temporary or dynamic storage facility. It carries both logical
(use within a program) and physical connotations.
byte. An 8-bit storage unit; the smallest addressable unit of memory representing one
alphanumeric character.
cache. A portion of memory that temporarily stores an entire directory, a set of names, or a
set of files.
catalog. A collection of files that maintains context for virtual disk processes, pools, or
$ZSMS.
checksum. A technique for checking the validity of a multiple-byte block of data by
arithmetically adding all the bytes together to obtain a sum. If the sum does not match
the one that was previously computed, an error exists somewhere within the block of
data.
COBOL. The compiler and run-time support for the American National Standard
Programming Language Common Business-Oriented Language (COBOL). The code
for most Pathway server processes is written in this language.
DEFINE attribute. A name identifying a class of DEFINE (TAPE or SPOOL) or a particular
object (FILE or SUBVOL). A DEFINE attribute is always associated with a value as an
attribute/value pair in a named DEFINE.
A named set of attributes and associated values. A user can specify information that
jobs communicate to processes they start. Default DEFINEs hold the standard default
values of a process such as the default volume. Spool DEFINEs pass information to
the spooler collector process. The attributes of a spool DEFINE specify parameters
such as the spooler location and batch name. SQL catalog DEFINEs specify the
locations of SQL/MP catalogs. A user can enter the logical name of the catalog
DEFINE in place of a catalog name in CATALOG clauses in SQL/MP data manipulation
language (DML) statements. Tape DEFINEs pass information to the tape process
during labeled-tape operations. Tape DEFINE attributes specify parameters such as
the tape device name and the record format.
direct file. A file that is not on an SMF virtual disk; its logical (external) name and physical
(internal) file are identical. All files on direct volumes are direct, and files on physical
volumes in pools can also be direct.
direct volume. A volume that is not in any pool. All files contained in a direct volume are
direct files.
Disk Compression Program (DCOM). A software product for NonStop systems that
compresses or joins together the pieces of fragmented disk files to increase usable
disk space.
Disk Space Analysis Program (DSAP). A software product for NonStop systems that is
used to analyze use of space on a disk.