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THESIS: Queues are Databases
January 1, 1995
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Download Document
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BibTex
Authors

Jim Gray
Publication Type
Inproceedings

Abstract
Abstract
Message-oriented-middleware (MOM) has become an small industry. MOM offers queued
transaction processing as an advance over pure client-server transaction processing. This note
makes four points: Queued transaction processing is less general than direct transaction
processing. Queued systems are built on top of direct systems. You cannot build a direct system
atop a queued system. It is difficult to build direct, conversational, or distributed transactions
atop a queued system. Queues are interesting databases with interesting concurrency control. It is
best to build these mechanisms into a standard database system so other applications can use
these interesting features. Queue systems need DBMS functionality. Queues need security,
configuration, performance monitoring, recovery, and reorganization utilities. Database systems
already have these features. A full-function MOM system duplicates these database features.
Queue managers are simple TP-monitors managing server pools driven by queues. Database
systems are encompassing many server pool features as they evolve to TP-lite systems.
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