Model 204
Model 204 (M204) is a database management system for IBM and compatible mainframe computers, “born” 1965 October 13,[1]:66[2] and first deployed in 1972. It incorporates a programming language and an environment for application development. Implemented in assembly language[2] for IBM System/360 and its successors, M204 can deal with very large databases[3] and transaction loads of 1000 TPS.[1]:4
Product description
Model 204 relies on its own type of bitmap index, originally devised by Professor Patrick E. O'Neil, and combines the use of hash table, B-tree, and record list technologies to optimize speed and efficiency of database access.[4][5]
It was described as "one of the three major inverted-list (database systems) ... the other two being" ADABAS and ADR's Datacom/DB.[6]
Although M204 is a pre-SQL (and pre-relational) database product, it is possible to manually map the files of an M204 database to approximate SQL equivalents and provide some limited SQL functionality using Model 204 SQL Server.[7]
Model 204 is commonly used in government and military applications.[8][9][10]
Model 204 was a product of Computer Corporation of America (CCA). In April 2010, CCA was acquired by Rocket Software, a Boston-based developer of enterprise infrastructure products.[11]
Computer Corporation of America
Computer Corporation of America (CCA) was a computer software and database systems company that was founded in 1965[12] and was acquired by Rocket Software, a Boston-based developer of enterprise infrastructure products[13] in April 2010.
Corporate information
Add-on products for Model 204 database were formerly available from Sirius Software, Inc.[14] Sirius, located in Cambridge, Massachusetts, USA, was acquired by Rocket Software in 2012.[15]
Computer Corporation of America also purchased the System 1022 and System 1032 assets of Software House; these database systems were designed for systems produced by Digital Equipment Corporation.[16]
See also
References
- 1 2 Scinta, Gina (2005-10-10). "Model 204 v6r1: Opening New Doors" (PDF). Computer Corporation of America. Archived from the original (PDF) on January 24, 2013. Retrieved 2012-10-26.
- 1 2 "Model 204, A Novel DBMS and Application Platform". Sirius Software. Retrieved 2012-10-26.
- ↑ "with Model 204 you get excellent performance, even with large databases and ... of America's largest companies— for financial applications, inventory control." "Model 204 database". ComputerWorld. December 1980. p. 36.
- ↑ O'Neil, Patrick (1987). "Model 204 Architecture and Performance". Proceedings of the 2nd International Workshop on High Performance Transaction Systems. Springer-Verlag. pp. 40–59.
- ↑ Sandy Stanhope, Database Administrator. "What is Model 204?". The Youngstown State University Computing Newsletter. Department of Computer Services. Retrieved 11 January 2008.
- ↑ "Software AG memories". March 25, 2011.
ADABAS was .. one of the three major inverted-list DBMS, the other two being Computer Corporation of America’s Model 204 and ADR’s Datacom/DB.
- ↑ "Rocket Model 204 SQL Server Users Guide". Rocket Software. May 2012. Retrieved 2012-10-27.
- ↑ "Model 204 is commonly used in government and military applications. Among other things, it runs Australia's social security system." "What is Model 204?". December 17, 2013.
- ↑ Rodney Gedda (Techworld Australia) (May 2009). "Centrelink ups IT reform, keeps Model 204 'legacy'". Retrieved 9 February 2011.
- ↑ IT News Australia (November 2013). "Sterrenberg calm in the face of an uphill battle". Retrieved 11 November 2013.
- ↑ http://www.ebizq.net/news/12526.html; acquired June 13, 2010
- ↑ "Company Overview of Computer Corporation of America". Bloomberg.com.
- ↑ http://www.ebizq.net/news/12526.html; acquired June 13, 2010
- ↑ not to be confused with the video-game publisher described at Sirius Software that opened and folded in the 1980s.
- ↑ Seiffert, Don (2012-11-29). "Rocket Software buys fifth company this year". Boston Business Journal. Retrieved 2016-05-02.
- ↑ "System 1022 Database System".
External links
- Model 204 at Rocket Software
- Model 204 at Sirius Software
- An example of Model 204 User Language programming