SNA NRJE User/Programmer Reference Manual (30292-90006)

38 Chapter2
Getting Started
Planning Jobs
Planning Jobs
When preparing jobs for a host, an NRJE user must consider host
system characteristics, such as the type of job entry subsystem and
programming languages supported, as well as the HP 3000 resources
configured for SNA NRJE.
Job Input
Jobs sent to a host system using a physical card reader normally consist
of Job Control Language (JCL) and data. These cards are concatenated
to form a job stream.
Jobs sent to a host system using NRJE must be constructed as if they
would be sent directly to the host using a card reader. However, input
through NRJE is in card images instead of physical cards. Card record
image sizes must be a minimum of 80 bytes for all supported host job
entry subsystems, and can be a maximum size of the following:
• 248 bytes for JES2 or JES3 workstations that use a 256-byte RU.
• 252 bytes for JES2 or JES3 workstations that use a 512-byte RU.
• 252 bytes for JES2 or JES3 workstations that use a 768-byte RU.
• 128 bytes for VSE/POWER workstations.
You combine records into files. Then you identify to NRJE the files to be
sent to the host. You can use the first and last files of the set for routine
JCL statements.
When NRJE processes a SUBMIT command, it opens each card reader
image file in sequence. Each file is opened, its records are read and then
written to a spool file that is submitted to the host. Then the file is
closed.
SNA NRJE accepts input from two types of card image files:
• Infiles
• FD files
Infiles
An
Infile contains a complete job or a partial job. The file can contain
##FD cards that point to additional files to be included in your spool
file. In fact, an
Infile can consist of ##FD cards only. Also, an Infile
can be transmitted without translation. Chapter 3 , “User Commands,”
describes the SUBMIT command, which is used to identify
Infiles to be
transmitted.