Distributed data processing

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{{For|topic in computer science|distributed computing|data processing}}

File:DARPA Big Data.jpg

Distributed data processing{{cite news |work=The New York Times |url=https://www.nytimes.com/1981/01/21/business/northern-telecom-s-setback.html |title=Northern Telecom's Setback |date=January 21, 1981}} (DDP){{cite magazine |magazine=Data Communications |date=October 1977

|author=Ernest E. Keet |title=Distributed data processing: the key is software}} was the term that IBM used for the IBM 3790 (1975) and its successor, the IBM 8100 (1979). Datamation described the 3790 in March 1979 as "less than successful."{{cite magazine |magazine=Datamation |date=March 1979 |last= Woods |first=Larry |title= IBM's 8100: First Impressions}}"(which can simulate 3790 functions through the DPCX operating system)"

Distributed data processing was used by IBM to refer to two environments:

• IMS DB/DC
• CICS/DL/I{{cite magazine |magazine=Computerworld |author=Ronald G. Ross |title=IBM's Distributed Processing Capabilities For Large-Scale Data Base Systems, Part 1}}{{cite magazine |magazine=Computerworld |author=Ronald G. Ross |title=IBM's Distributed Processing Capabilities For Large-Scale Data Base Systems, Part 2}}

Each pair included a Telecommunications Monitor and a Database system. The layering involved a message, containing information to form a transaction, which was then processed by an application program. Development tools such as program validation services were released by IBM to facilitate expansion.{{cite magazine |title= The 3790: A Glimpse Into IBM's Future Plans? |author= Ronald A. Frank |magazine= Computerworld |date= July 16, 1975 |page= 15 |volume=9|issue=29 |publisher=IDG Enterprise |url= https://books.google.com/books?id=4W_8uJni4f0 |issn=0010-4841}}

Use of "a number of small computers linked to a central computer" permitted local{{cite news |work=The New York Times |url=https://www.nytimes.com/1983/06/23/business/ibm-displays-new-processor.html?pagewanted=print |title=I.B.M. Displays New Processor |date=June 23, 1983}} and central processing, each optimized at what it could best do. Terminals,{{cite news |work=The New York Times |url=https://www.nytimes.com/1981/12/11/business/motorola-to-acquire-computer-maker.html |title=Motorola to acquire computer maker |date=December 11, 1981}} including those described as intelligent, typically were attached locally,{{cite news |work=The New York Times |url=https://www.nytimes.com/1979/10/21/archives/mr-fixit-of-northern-telecom.html |title=Mr. Fixit of Northern Telecom |author=Jay Bryan |date=October 21, 1979}} to a "satellite processor."{{cite book |newspaper=The New York Times |url=https://www.nytimes.com/1979/02/04/archives/to-clone-a-computer-neophyte-national-semiconductor-has-jolted-the.html |title=To Clone a Computer |author=Peter J. Schuyten |date=February 4, 1979}} Central systems, sometimes multi-processors, grew to handle the load.{{cite news |work=The New York Times |url=https://www.nytimes.com/1982/10/15/business/honeywell-s-new-computer.html |title=Honeywell's New Computer |date=October 15, 1982}} Some of this extra capacity, of necessity, is used to enhance data security.{{cite news |work=The New York Times |url=https://www.nytimes.com/1979/09/27/archives/technology-computers-and-criminals.html |title=Technology |author=Peter J. Schuyten |date=September 27, 1979}} Years before open systems made its presence felt, the goal of some hardware suppliers was "to replace the big, central mainframe computer with an array of smaller computers that are tied together."{{cite news |work=The New York Times

|url=https://www.nytimes.com/1987/05/19/business/challenge-for-honeywell-bull.html |title=Challenge for Honeywell Bull |author=Steven Greenhouse |date=May 19, 1987}}