NBSpool for MPE Reference Guide

Chapter 5
5-4
Background Execution
More than one XEQ command can be executed simultaneously in one job or session by using the
XEQ…;BACKGROUND option. This option starts a son process, and executes in the background. Each
son process has its option routed to a spool file named
XEQOUT
n
, where
n
is a number from
1
to
8
of
the process in question. All output from the son processes is directed to one of these files. To
increase the maximum number of processes, use the NBSpool
SET command.
If background processes are started from an interactive session, the
EXIT and QUIT command will be
rejected until all background processes complete or are stopped with
XEQSTOP commands. If an
EXIT or QUIT is found in a job, the original process will suspend until all background processes are
complete. The following commands are valid in an
XEQ command file.
ALTER ARCDIR ARCHIVE BANNER
COPY DUP END ERROR
INPUT MERGE MOVE OUTPUT
PURGE RESTORE SHOW SORT
STORE STREAM TAPEDIR UNARCHIVE
VDIR VFILE VSAVE WHILE
All of these commands except END and ERROR are standard NBSpool commands and are described
in Chapters 3 and 4 in this guide. The
END and ERROR commands are used only in an XEQ
command file and are described in this section.