Examine the Fast-start configuration:
DGMGRL> show fast_start failover;
Fast-Start Failover: ENABLED
Threshold : 30 seconds
Target: sheep
Observer : 017.example.com
Lag Limit: 30 seconds (not in use)
Shutdown Primary: TRUE
Auto-reinstate: TRUE
Observer Reconnect: (none)
Observer Override: FALSE
Configurable Failover Conditions
Health Conditions:
Corrupted Controlfile YES
Corrupted Dictionary YES
Inaccessible Logfile NO
Stuck Archiver YES
Datafile Offline YESOracle Error Conditions:
(none)
Which three are true?
A.
The observer will initiate a failover when the primary database is unable to produce local archived redo log
files.
B.
An automatic failover will be initiated even if the target standby database lags behind the primary.
C.
The observer is running.
D.
A failover may occur if the observer has lost connectivity to the primary database, even if the Fast-Start
Failover target standby database has a good connection to the primary database.
E.
The configuration operates in Maximum Availability mode.
F.
The configuration operates in Maximum Performance mode.
Explanation:
A: Stuck Archiver: YES
Archiver is unable to archive a redo log because the device is full or unavailable.
C: Observer : 017.example.com
E: The FastStartFailoverLagLimit configuration property is only used by the broker when enabling fast-start
failover for configurations operating in maximum performance mode.
docs.oracle.com/cd/E11882_01/server.112/e40771/sofo.htm
A,C,E
A – Stuck Archiver YES – Archiver unable to archive a redo log because the device is full or unavailable.
C – Observer : 017.example.com – The observer is a separate OCI client-side component that runs on a different computer from the primary and standby databases and monitors the availability of the primary database. Observer is running on o17.example.com
E – Lag Limit: 30 seconds (not in use) – This configuration property establishes an acceptable limit, in seconds, that the standby is allowed to fall behind the primary in terms of redo applied, beyond which a fast-start failover will not be allowed. The lowest possible value is 10 seconds. This property is used when fast-start failover is enabled and the configuration is operating in maximum performance mode. Here it is not in use which means the configuration is operating in maximum availability mode.
A,C,E