| 词条 | Model 204 |
| 释义 |
Model 204 (M204) is a database management system for IBM and compatible mainframe computers, “born” 1965 October 13,[1]{{rp|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]{{rp|4}} Product descriptionModel 204 relies on its own type of bitmap index, originally devised by Bill Mann, and combines the use of hash table, B-tree, and partitioned 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.[15] Computer Corporation of AmericaComputer Corporation of America (CCA) was a computer software and database systems company that was founded in 1965[16] and was acquired by Rocket Software, a Boston-based developer of enterprise infrastructure products[17] in April 2010. Corporate informationAdd-on products for Model 204 database were formerly available from Sirius Software, Inc.[18] Sirius, located in Cambridge, Massachusetts, USA, was acquired by Rocket Software in 2012.[19] 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.[20] See also
References1. ^1 {{cite web|last=Scinta |first=Gina |title=Model 204 v6r1: Opening New Doors |url=http://sirius-software.com/sug05/m20461.pdf |publisher=Computer Corporation of America |accessdate=2012-10-26 |date=2005-10-10 |deadurl=yes |archiveurl=https://web.archive.org/web/20130124071824/http://sirius-software.com/sug05/m20461.pdf |archivedate=January 24, 2013 }} 2. ^1 {{cite web|title=Model 204, A Novel DBMS and Application Platform|url=http://sirius-software.com/m204.html|publisher=Sirius Software|accessdate=2012-10-26}} 3. ^"with Model 204 you get excellent performance, even with large databases and ... of America's largest companies— for financial applications, inventory control." {{cite magazine|magazine=ComputerWorld |date=December 1980 |page=36|title=Model 204 database |url=https://books.google.com/books?id=J_iAWQ5n914C}} 4. ^{{cite conference | last = O'Neil | first = Patrick | title = Model 204 Architecture and Performance | booktitle = Proceedings of the 2nd International Workshop on High Performance Transaction Systems | pages = 40–59 | publisher = Springer-Verlag | year = 1987 | url=http://portal.acm.org/citation.cfm?coll=GUIDE&dl=GUIDE&id=658338}} 5. ^{{cite web|url= http://cc.ysu.edu/ComputerServices/Newsletter/link0102/model204.htm |title= What is Model 204? |accessdate= 11 January 2008 |author= Sandy Stanhope, Database Administrator |work= The Youngstown State University Computing Newsletter |publisher= Department of Computer Services |doi= |archiveurl= |archivedate= |quote= }} 6. ^{{cite web|quote=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.|url=http://www.softwarememories.com/category/companies/software-ag|date=March 25, 2011 |title=Software AG memories}} 7. ^{{cite web|title=Rocket Model 204 SQL Server Users Guide|url=http://www.rocketsoftware.com/m204/products/index/documentation/v7r4/M204-SQL-Server-UG/view|publisher=Rocket Software|date=May 2012|accessdate=2012-10-27}} 8. ^"Model 204 is commonly used in government and military applications. Among other things,it runs Australia's social security system." {{cite web|title=What is Model 204?|url=http://www.zmainframes.com/viewtopic.php?t=552|date=December 17, 2013}} 9. ^{{cite web|url= http://www.techworld.com.au/article/303153/centrelink_ups_it_reform_keeps_model_204_legacy_/ |title= Centrelink ups IT reform, keeps Model 204 'legacy' |accessdate= 9 February 2011 |author= Rodney Gedda (Techworld Australia) |date=May 2009 |work= |publisher= |doi= |archiveurl= |archivedate= |quote= }} 10. ^{{cite web|url=http://www.itnews.com.au/News/363427,sterrenberg-calm-in-the-face-of-an-uphill-battle.aspx?eid=1&edate=20131108|title= Sterrenberg calm in the face of an uphill battle |accessdate= 11 November 2013|author= IT News Australia |date=November 2013 |work= |publisher= |doi= |archiveurl= |archivedate= |quote= }} 11. ^{{cite web|title=County of Ventura Technology Infrastructure Strategic Plan|url=http://www.vchca.org/docs/behavioral-health/isd-strategicplan-attach-b.pdf|publisher=Gartner|accessdate=2012-10-25|page=43|date=2005-07-13}} 12. ^{{cite web|title=Model 204 Civil Inquiry Manual|url=http://www.harriscountytx.gov/CmpDocuments/98/JIMS-Regular/civ_inq.pdf|publisher=Harris County, Texas|accessdate=2012-10-25|date=June 2007}} 13. ^{{cite web|title=M204 Client List|url=http://www.dptoolkit.com/M204ClientList.xls|accessdate=2012-10-28|author=Paul Keshvari|year=2010|display-authors=etal|archive-url=https://web.archive.org/web/20131111082934/http://www.dptoolkit.com/M204ClientList.xls|archive-date=2013-11-11}} 14. ^{{cite book |url=https://archive.org/stream/CIADocuments/CIA-402#page/n29/mode/2up |title=Fleet Intelligence Center Europe and Atlantic: Command History: 1 January 1986 – 31 December 1986 |publisher=United States Navy |pages=III-B-3, III-B-7 |accessdate=2016-05-02 }} 15. ^http://www.ebizq.net/news/12526.html; acquired June 13, 2010 16. ^{{cite web |website=Bloomberg.com|url=https://www.bloomberg.com/research/stocks/private/snapshot.asp?privcapid=728447|title=Company Overview of Computer Corporation of America}} 17. ^http://www.ebizq.net/news/12526.html; acquired June 13, 2010 18. ^not to be confused with the video-game publisher described at Sirius Software that opened and folded in the 1980s. 19. ^{{cite news |last=Seiffert |first=Don |url=http://www.bizjournals.com/boston/blog/mass-high-tech/2012/11/rocket-software-buys-fifth-company-this-year.html |title=Rocket Software buys fifth company this year |work=Boston Business Journal |date=2012-11-29 |accessdate=2016-05-02 }} 20. ^{{cite web|url=https://groups.google.com/d/topic/alt.sys.pdp10/LmLLRrpcK70|title=System 1022 Database System}} External links
2 : Proprietary database management systems|IBM mainframe software |
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