MPE/iX Glossary of Terms and Acronyms (32650-90887)

38 Chapter1
Glossary of Terms
commands for processing with a single command. Once submitted, the job
executes independently of the user's session. Jobs are used to compile
source programs, modify files, or perform other functions not requiring
user interaction. See batch processing and stream.
job control word (JCW) A 16-bit logical word residing in an MPE-managed table. It's
used to control command execution within a job or a session. See variable
or MPE/iX variable.
jobfence A limit established to manage jobs. If a job has an input priority higher
than the jobfence, it executes. If it has an input less than or equal to the
jobfence, it does not execute.
job file A file that contains commands that will be executed noninteractively. A job
file begins with the JOB command and ends with the EOJ command.
job limit A limit set to manage jobs. The system manager or operator can restrict
system usage by limiting the number of jobs allowed to run on the system.
If the LIMIT command is used to set the job limit to 0 (zero), no additional
jobs can log onto the system.
job listing See listing.
job number A system assigned identification number given to each job when it is
submitted for processing.
job state A generic term for the preliminary stages, excluding initial validation, a
new job or session must pass through during its lifespan. See executing
states.
JSMAIN An MPE/iX process that handles the logon dialog, maintains session
tables, and creates a command interpreter (CI).
K Kilo (1000). In computer terminology, K is commonly a symbol
representing the number 1024, or 2 raised to the 10th power. Frequently
used as a synonym for thousand.
K file A recovery file created by EDIT/3000, with a name in the form Kdddhhmm,
where the first three characters (ddd) show the Julian day, and the next
four (hhmm) characters show the time in hours and minutes when work
began on the file. A new K file is created every time a new file is created or
an existing file is loaded for editing. If a system problem occurs, the data in
the new or loaded file is saved to the K file for recovery purposes.
kernel A set of routines in the operating system. The kernel is the executable code
responsible for overall control of the computer's resources, such as
allocating memory, creating processes, and scheduling programs for
execution. See control program.
key In ALLBASE/SQL, a column used in an index definition.
keyboard A keyboard is attached to a terminal and is a means of inputting data to
communicate with the system.
keyed file A file whose records can be read in logical sequence or directly accessed by
a key associated with each record.