Method and apparatus for updating application databases used in a distributed transaction processing environment
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United States of America Patent
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May 18, 1993
Grant Date -
N/A
app pub date -
Oct 12, 1989
filing date -
Oct 12, 1989
priority date (Note) -
Expired
status (Latency Note)
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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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