Z/VM
Computer operating system
title: "Z/VM" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["virtualization-software", "ibm-mainframe-operating-systems"] description: "Computer operating system" topic_path: "technology/operating-systems" source: "https://en.wikipedia.org/wiki/Z/VM" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Computer operating system ::
::data[format=table title="Infobox OS"]
| Field | Value |
|---|---|
| name | z/VM |
| logo | IBM logo.svg |
| logo size | 120px |
| caption | z/VM running CMS fullscreen |
| developer | IBM |
| family | VM family |
| source_model | Closed source |
| working_state | Current |
| latest_release_version | 7.4 |
| latest_release_date | |
| license | Proprietary |
| website | |
| :: |
Main article: VM (operating system)}}{{lowercase
| name = z/VM | logo = IBM logo.svg | logo caption = | logo size = 120px | screenshot = | caption = z/VM running CMS fullscreen | developer = IBM | family = VM family | source_model = Closed source | working_state = Current | latest_release_version = 7.4 | latest_release_date = | kernel_type = | license = Proprietary | website = z/VM is the current version in IBM's VM family of virtual machine operating systems. First released in October 2000, z/VM remains in active use and development . It is directly based on technology and concepts dating back to the 1960s, particularly IBM's CP/CMS on the IBM System/360-67 (see article History of CP/CMS for historical details). z/VM runs on IBM's IBM Z family of computers and can support large numbers (thousands) of Linux virtual machines. (See Linux on IBM Z.)
On 16 September 2022, IBM released z/VM Version 7.3 which requires z/Architecture, implemented in IBM's EC12, BC12 and later models.
References
Citations
; Primary CP/CMS sources:
- R. J. Creasy, "The origin of the VM/370 time-sharing system", IBM Journal of Research & Development, Vol. 25, No. 5 (September 1981), pp. 483–90, PDF ― perspective on CP/CMS and VM history by the CP-40 project lead, also a CTSS author
- E.W. Pugh, L.R. Johnson, and John H. Palmer, IBM's 360 and early 370 systems, MIT Press, Cambridge MA and London, ― extensive (819 pp.) treatment of IBM's offerings during this period; the limited coverage of CP/CMS in such a definitive work is telling
- Melinda Varian, VM and the VM community, past present, and future, SHARE 89 Sessions 9059–61, 1997; ― an outstanding source for CP/CMS and VM history
- Bitsavers, Index of /pdf/ibm/360/cp67
; Additional CP/CMS sources:
- R. J. Adair, R. U. Bayles, L. W. Comeau and R. J. Creasy, A Virtual Machine System for the 360/40, IBM Corporation, Cambridge Scientific Center Report No. 320‐2007 (May 1966) ― a seminal paper describing implementation of the virtual machine concept, with descriptions of the customized CSC S/360-40 and the CP-40 design
- International Business Machines Corporation, CP-67/CMS, Program 360D-05.2.005, IBM Program Information Department (June 1969) ― IBM's reference manual
- R. A. Meyer and L. H. Seawright, "A virtual machine time-sharing system," IBM Systems Journal, Vol. 9, No. 3, pp. 199–218 (September 1970) ― describes the CP-67/CMS system, outlining features and applications
- R. P. Parmelee, T. I. Peterson, C. C. Tillman, and D. J. Hatfield, "Virtual storage and virtual machine concepts," IBM Systems Journal, Vol. 11, No. 2 (June 1972)
; Background CP/CMS sources:
- F. J. Corbató, et al., The Compatible Time-Sharing System, A Programmer’s Guide, M.I.T. Press, 1963
- F. J. Corbató, M. Merwin-Daggett, and R. C. Daley, "An Experimental Time-sharing System," Proc. Spring Joint Computer Conference (AFIPS) 21, pp. 335–44 (1962) — description of CTSS
- F. J. Corbató and V. A. Vyssotsky, "Introduction and Overview of the MULTICS System", Proc. Fall Joint Computer Conference (AFIPS) 27, pp. 185–96 (1965)
- P. J. Denning, "Virtual Memory", Computing Surveys Vol. 2, *pp. * 153–89 (1970)
- J. B. Dennis, "Segmentation and the Design of Multi-Programmed Computer Systems," JACM Vol. 12, pp. 589–602 (1965) ― virtual memory requirements for Project MAC, destined for GE 645
- C. A. R. Hoare and R. H. Perrott, Eds., Operating Systems Techniques, Academic Press, Inc., New York (1972)
- T. Kilburn, D. B. G. Edwards, M. J. Lanigan, and F. H. Sumner, "One-Level Storage System", IRE Trans. Electron. Computers EC-11, pp. 223–35 (1962) ― Manchester/Ferranti Atlas
- R. A. Nelson, "Mapping Devices and the M44 Data Processing System," Research Report RC 1303, IBM Thomas J. Watson Research Center (1964) ― about the IBM M44/44X
- R. P. Parmelee, T. I. Peterson, C. C. Tillman, and D. J. Hatfield, "Virtual Storage and Virtual Machine Concepts", IBM Systems Journal, Vol. 11, pp. 99–130 (1972)
; Additional on-line CP/CMS resources:
- febcm.club.fr — Information Technology Timeline , 1964–74
- www.multicians.org — Tom Van Vleck's short essay The IBM 360/67 and CP/CMS
- www.cap-lore.com — Norman Hardy's Short history of IBM's virtual machines
- www.cap-lore.com — Norman Hardy's short description of the "Blaauw Box"
References
- (6 August 2024). "Introducing IBM z/VM 7.4".
- (2 August 2022). "IBM: VM 50th Anniversary".
- (2024). "z/VM 7.4, General Information". IBM.
- (13 September 2022). "Announcement".
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::