A Failover can be performed when all or most of the information until the Unavailability of the Primary Database was propagated to the Standby. The usage of Standby #Redo #Logs is a great advantage here. If you have no Standby Redo Logs available, you will always encounter some Data Loss (depending on the Changes since the latest #Log_Switch)
00:00 What is failover
08:12 Dealing with crashed primary
08:21 Rebuild primary server
09:01 Configure physical standby
12:49 Manual Failover Steps
16:03 Failover activity
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