Consistent recreation of events from activity logs

Details Consistent recreation of events from activity logs Consistent recreation of events from activity logs

1995-06-07

1997-03-18

Black, Thomas G.

Boots, shoes, and leggings

395608, 395617, 395230, 3642821, 364DIG1, G06F 1730

Patent

active

056131135

ABSTRACT:
A computing system associates time series data with data base changes, received from concurrent processes, that are recorded in an activity log by defining a data base table to include a column in which a system clock time stamp value can be recorded when initializing a new copy of the data. Initialization can be set to occur automatically at periodic intervals or whenever a fresh copy of a set of data records is requested by a system process. The writing of the time stamp data associates a time value with the copy initialization activity and makes time series data available to processes that otherwise would have no time knowledge. The prior user-defined data base does not have to be modified to utilize the time stamp feature because a new, system-defined table is used.

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Bo Kahler and Oddvar Risnes, "Extended Logging for Database Snapshot Refresh," Proceedings of the 13th International Conference on Very Large Data Bases, Brighton, England, Sep. 1-4, 1987, pp. 389-398.

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