System for parallel processing of complex read-only database que

Details System for parallel processing of complex read-only database que System for parallel processing of complex read-only database que

1993-11-04

1996-02-27

Black, Thomas G.

Boots, shoes, and leggings

3642304, 3642294, 364DIG1, 3642824, G06F 1730, G06F 1517

Patent

active

054956064

ABSTRACT:
A parallel query processing system comprises a front end processor, a query processing complex attached to the front end processor, and a database on a data repository attached by a first path to the front end processor, and by one or more additional paths to one or more slave processors within the query processing complex. An external operations command processor within the front end processor quiesces database managers in the slave processors to permit maintenance operations by the front end processor, and restarts the slave processors in read-only mode after maintenance operation completion. A splitter/scheduler function in a master processor within the query processor complex receives complex read-only queries from the front end processor, splits them into query elements, schedules the query elements for execution on the slave processors and recombines the execution results to be sent back to the front end processor.

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