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Essay / Research Paper Abstract
This 6 page report discusses the Apollo and Galileo airline reservation systems that are considered to be distributed transaction processing applications. Such applications are widely used by enterprises to support mission-critical applications, such as and banking applications. The focus of the paper is from a systems information approach and deals primarily with the software and hardware connections involved. Bibliography lists 5 sources.
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6 pages (~225 words per page)
File: D0_BWairres.rtf
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isolation, and durability) properties of the transactions and provides recovery facilities for aborting transactions and recovering from or network failures. Transaction processing are widely used by enterprises to support mission-critical
applications, such as and banking applications. Such applications need to store and update data reliably, provide concurrent access to the data by hundreds or thousands of users, and maintain the
reliability of the data in the presence of system failures. Distributed applications provide several advantages. The data maintained by an organization may itself
be distributed because of historical and geographical considerations. Furthermore, distributed applications are able to take full advantage of parallelism by operating concurrently on multiple machines, thereby improving the throughput.
Data may also be disbursed in view of the database becoming too large or the CPU on the database machine acting as a bottleneck. Data can also be distributed in
such a way as to improve availability and speed up the overall response time by keeping the data close to the users accessing it. Finally, data can be distributed to
separate administrative domains, such as different divisions in the same corporation (Gupta 61). Galileo and Apollo When a traveler purchases his or her
airline ticket through a travel agent in the United State, the odds are better than 2-to-1 that the ticket will be booked through a computerized maintained by either The Sabre
Group or Galileo International Inc. Between them, Sabre and Galileo have nearly 300,000 terminals connected to their networks at travel agencies around the world. Every time an agent books a
flight through one of these terminals, Sabre or Galileo gets $3 from the Fort Worth, Tex.-based Sabre, 82%- owned by AMR Corp., the parent of American earned $200
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