NETRJS: A third level protocol for Remote Job Entry (RFC0088)
Original Publication Date: 1971-Jan-13
Included in the Prior Art Database: 2001-Nov-15
Internet Society Requests For Comment (RFCs)
R.T. Braden: AUTHOR [+1]
NETRJS is the name for a message protocol and set of control conventions which will allow users at remote Hosts to access the RJS ("Remote Job Service") remote batch subsystem of CCN. RJS was written at CCN to support remote batch (car reader/line printer) terminals over communications lines.
Network Working Group R. Braden
Request for Comments: 88 S. Wolfe
NIC: 5668 UCLA/CCN
13 January 1971
NETRJS - A THIRD LEVEL PROTOCOL FOR REMOTE JOB ENTRY
NETRJS is the name for a message protocol and set of control
conventions which will allow users at remote Hosts to access the RJS
("Remote Job Service") remote batch subsystem of CCN. RJS was
written at CCN to support remote batch (car reader/line printer)
terminals over communications lines.
RJS makes a remote batch terminal's unit record devices operate as if
they were at the central site; thus, a remote user enters OS/360
jobs, complete with JCL, into the remote reader. The jobs are
spooled into the operating system and run in their turn, and the
printed and/or punched output is returned to the remote terminal from
which the jobs originated (unless the user or operator re-routes the
output). The remote terminal may also include a console typewriter
to be used by the remote operator to receive and send messages and to
exert control over his terminal .
When RJS is used via the ARPA Network, the "remote terminal" is
expected to be a multiprogrammed user process in a remote Host. We
will use the RJS term "remote site" for such a user process, which
presumably simulates unit record devices by file I/O. Furthermore,
several users at the same remote Host may simultaneously use NETRJS,
acting as independent "remote sites" distinguished by 8-character
names called _terminal-ids_ (because each remote site appears to RJS
as a separate physical terminal). Valid terminal-ids will be
assigned to individual users or user groups at remote Hosts who wish
to use NETRJS.
Under NETRJS, a separate ARPA network connection is opened from this
remote site to CCN for each (simulated) unit record device. Each
such connection will be called a _channel_ and be designated _input_
or _output_ with reference to CCN. We define a _standard_ remote
site in NETRJS to have the following five channels (See Figure 1):
1._Operator Input Channel_ - Commands and messages entered by
remote "operator" console.
2 _Operator Output Channel_ - Message stream which would normally
be directed to remote operator.
Braden, et. al. [Page 1]
RFC 88 NETRJS - A THIRD LEVEL PROTOCOL 13 January 1971
3._Input Stream_ - One simulated Hollerith card reader for job
4._Printer Stream_ - One simulated line printer to record printed
output (system messages and SYSOUT data sets) from jobs.
5._Punch Stream_ - One simulated card punch, capable of recording
arbitrary (i.e., transparent) binary text.
RJS actually will support more than one reader, printer, and punch at
each remote terminal, so the NETRJS protocol could easily be expanded
to allow multiple simultaneous I/O streams to each Network user.
However, this does not presently appear useful, as the ARPA Network
bandwidth will normally be the limitation on the transmission speed
Under NETRJS, the text of a single network message is called a
_block_. A bl...