Ultra-high speed database replication with multiple audit logs
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United States of America Patent
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Aug 24, 2004
Grant Date -
Dec 19, 2002
app pub date -
Jun 15, 2001
filing date -
Jun 15, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for high-speed database replication. Audit update records and audit backout records are generated by the primary system, and are transmitted to the backup system in multiple streams in parallel. The backup system stores the received audit records as audit image trails, and applies the audit updates and audit backouts to the backup database without regard to whether the transactions committed or aborted and without regard to whether the backup system received a complete set of the audit records pertaining to the transactions. Upon the occurrence of a predetermined event, the backup system applies all the audit updates and backouts it received, and subsequently 'undoes' questionable audit updates and audit backouts.
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