Home » Oracle » 1z0-066 » Which three are prerequisites for enabling Fast-Start Failover?
Which three are prerequisites for enabling Fast-Start Failover? (Choose three.)
A. The Fast-Start Failover target standby database must receive REDO directly from the primary database.
B. Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database.
C. Flashback Database must be enabled only on the Fast-Start Failover target standby database.
D. The configuration must be operating in either Maximum Performance or Maximum Availability mode.
E. The configuration must be operating in either Maximum Performance or Maximum Protection mode.
F. The Data Guard environment must be managed by the Data Guard Broker.
Correct Answer: BDF
Explanation/Reference:
B: You enable the Flashback Mode both on the primary database and on the standby database.
D: In Maximum Availability mode, Fast-Start Failover (FSFO) guarantees that no transaction that has received a commit acknowledgment will be lost during a failover. Oracle Database 11g FSFO adds support for Maximum Performance mode (async redo transfer), providing the flexibility to trade durability for performance. F: The Dataguard Broker Observer (Observer) is used when fast start failover is required. Fast start failover is simply an automatic failover to the standby database
Incorrect Answers:
C: You enable the Flashback Mode both on the primary database and on the standby database.
References:
http://dbasoumya.blogspot.se/2015/07/fast-start-failoverfsfo-in-oracle-11g.html http://www.oracle.com/technetwork/articles/smiley-fsfo-084973.html
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