Multiprogramming with a Variable number of Tasks
| History of IBM mainframe operating systems |
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On early mainframe computers: On S/360 and successors: |
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It has been suggested that this article or section be merged into OS/360 and successors. (Discuss) Proposed since November 2011. |
Multiprogramming with a Variable number of Tasks (MVT) was the most sophisticated of three available configurations of OS/360's control program.[1] In turn, OS/360 was an operating system for the IBM System/360 line of computers. MVT was intended for the largest machines in the System/360 family, introduced in 1964, but it did not become available until 1967. Early versions had many problems and the simpler MFT continued to be used for many years.
In later decades, MVT had been developed into MVS, then OS/390, and now z/OS.
Officially PCP, MFT and MVT were not separate operating systems, but rather three different configuration variants of the same OS/360 code base.[1] Because of quite different capabilities, system managers commonly considered them separate offerings, referring to them as early OS/360, OS/MFT, OS/MVT, respectively.
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[edit] References
- ^ a b IBM (1972) (PDF). OS/360 Introduction. IBM Systems Reference Library. pp. 50–51. GC28-6534-3. http://bitsavers.org/pdf/ibm/360/os/R21.0_Mar72/GC28-6534-3_OS360_Introduction_R21_Jan72.pdf. Retrieved 2007. "there are two configurations of the [OS/360] control program: ... MVT configuration"
[edit] Further reading
[edit] Manuals
- IBM, "MVT Guide" - GC28-6720-4, R21, March 1972
- IBM, "MVT Supervisor PLM" - GY28-6659-7, Program Logic Manual, March 1972
- IBM, "OS I/O Supervisor PLM" - GY28-6616-9, Program Logic Manual, R21.7, April 1973
[edit] Books
- Brooks, Jr., Frederick P. (1975). "The Mythical Man-Month: Essays on Software Engineering", Addison-Wesley. ISBN 0-201-00650-2. (Reprinted with corrections, January 1982)
- Pugh, Emerson W.; Johnson, Lyle R.; Palmer, John H. (1991). IBM's 360 and Early 370 Systems, Cambridge : MIT Press. (pp. 291–345)
