Job Entry Subsystem 1 (JES1)

Job Entry Subsystem 1 (JES1) was released by IBM to provide for VS1 the basic functions that users of VS1's predecessor, MFT, had when using HASP.

History

IBM proclaimed[1] JES1 to be "the single most important addition" to the job scheduling provided by VS1. IBM Systems Journal[2] defined JES1's services as Spooling and scheduling, adding "Its three major components are peripheral services, central services, and queue management."[3]

Reaction? "Users hated it.".[4] Why? HASP and ASP users often had made local modifications (edits),[5] and wanted to retain their investment.[6]

Features

JES1[7][8] permitted batch jobs to be submitted from remote sites, executed on an IBM mainframe, then produce printed output either at the originating site or, if desired, at the main site or another remote site.[4][9]

New Features

The JOB Card JCL was given a new option: TYPRUN=SCAN, whereby a job could be submitted for quick feedback, and - if no errors were detected - be submitted again (without TYPRUN=SCAN on the JOB Card.[1]:P.399

References

  1. 1 2 https://www.computer.org/csdl/proceedings/afips/1973/5081/00/50810395.pdf (p.395)
  2. ↑ Baily, J. H.; Howard, J. A.; Szczygielski, T. J. (1974). "The job entry subsystem of OS/VS1". IBM Systems Journal. 13 (3): 253–269. doi:10.1147/sj.133.0253. ISSN 0018-8670.
  3. ↑ following the way HASP operated.
  4. 1 2 https://share.confex.com/share%2F121%2Fwebprogram%2FHandout%2FSession14285%2FJES2%2520Bootcamp%2520Part%25201.pdf
  5. ↑ The article notes that "one customer has 35K lines of ... code." (p.9)
  6. ↑ above IBM document, page 5. Also, there was a HASP modification "clearinghouse" at University of Chicago, from which other HASP users "downloaded" (actually printed via RJE and rekeyed ("Keypunched"); this was before the term download was in use).
  7. ↑ Some claim that it was always called VS1 JES - https://groups.google.com/d/topic/alt.folklore.computers/qUV95ydSGtE
  8. ↑ IBM does refer to it as JES1 - see GC26-3846-3, IBM 3800 Printing Subsystem manual: says "JES1, the job entry subsystem for OS/VS1."
  9. ↑ which also (p.7) describes this as being an "early 'client server' which "Uses BSC and SNA protocols," adding "still used today." (2013)
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