Boots – shoes – and leggings
Patent
1989-10-12
1993-05-18
Clark, David L.
Boots, shoes, and leggings
364DIG1, 36422282, 3642821, 3642822, 395575, G06F 1214, G06F 1540
Patent
active
052127893
ABSTRACT:
A method and apparatus for updating application databases in real time in a distributed transaction processing environment, such as a service control point, without adversely affecting the throughput of transaction processing or losing substantially any conversational transactions that are being processed while updating is occurring. Specifically, two versions, e.g. an old and a new version, of the application databases exist within a memory device, e.g. a shared disk farm. After the start of a "transfer time period", all transactional messages associated with transactions that were initiated after the start of this period are processed using only the new versions of the application databases, while all transactional messages that are associated with transactions that were initiated prior to the start of this period are processed using the old versions thereof. At the expiration of this period, no such transactions will be processed using the old versions of the application databases, at which time, the old version of each such database can be deleted, if desired, from the memory device.
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E. A. Davis et al., "Life Cycle Support and Update of No. 4 ESS Software", IEEE International Conference on Communications, ICC'82. The Digital Revolution, 13-17 Jun. 1982, Philadelphia, Pa., vol. 13, pp. 5G5.1-5G5.6.
Bell Communications Research Inc.
Clark David L.
Falk James W.
Loomis John C.
Suchyta Leonard Charles
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