Home » RDBMS Server » Server Administration » understanding recovery from arc/redo logs
 understanding recovery from arc/redo logs [message #63188] |
Thu, 16 September 2004 07:09  |
priest holmes
Messages: 2
Registered: September 2004
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Junior Member |
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Assume running in archive mode.� I understand that the redo logs are copied by the ARC processes to another destination.� But this is what's confusing me.� During db recovery how does Oracle determine which redo records correspond to committed txns and which redo records correspond to aborted txns (and hence shouldn't be applied)???
I mean, you could have a long write txn that causes redo records to be written across 2 or more log files only to be aborted.� How does RECO know when rebuilding the db not to apply those redo records?
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