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Which two Data Guard features require the use of flashback database by the broker? (Choose two.)
C: Prerequisites that must be met before the broker allows you to enable fast-start failover include: Enable Flashback Database and set up a fast recovery area on both the primary database and the target standby database.
E: Introduced in 11g, snapshot standby allows the standby database to be opened in read-write mode. When switched back into standby mode, all changes made whilst in read-write mode are lost. This is achieved using flashback database, but the standby database does not need to have flashback database explicitly enabled to take advantage of this feature, thought it works just the same if it is.
References:
https://docs.oracle.com/database/121/DGBKR/sofo.htm#DGBKR391
https://oracle-base.com/articles/12c/data-guard-setup-using-broker-12cr1#flashback_database
Which statement is true regarding Oracle Net connectivity for a Data Guard Broker configuration?
The tnsnames.ora on both Primary as well as Standby sites have entries for the databases.
Note: TNSNAMES.ORA is a SQL*Net configuration file that defines databases addresses for establishing connections to them.
References:
http://gavinsoorma.com/2013/08/minimal-downtime-rolling-database-upgrade-to-12c-release-1/
There are currently 6 APPLIER and 6 PREPARER processes running and no idle APPLIER processes on your logical standby database.
The MAX_SERVERS SQL apply parameter and number of archiver processes are both set to 12.
Identify two changes, each of which would allow you to increase the number of APPLIER processes. (Choose two.)
There are three parameters that can be modified to control the number of processes allocated to SQL Apply: MAX_SERVERS, APPLY_SERVERS, and PREPARE_SERVERS. The following relationships must always hold true:
APPLY_SERVERS + PREPARE_SERVERS = MAX_SERVERS - 3
This is because SQL Apply always allocates one process for the READER, BUILDER, and ANALYZER roles.
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28294/manage_ls.htm
The Oracle database 12c Observer is currently running on host1 and you wish to have it running on host2.
Examine this list of possible steps:
1) Stop the observer on host1.
2) Disable Fast-Start Failover.
3) Update the broker configuration with the new observer hostname.
4) Enable Fast-Start Failover.
5) Start the Observer on host2.
Which contains the minimum required steps to move the observer to host2?
Which two steps must be performed before running DUPLICATE TARGET DATABASE FOR STANDBY using RMAN? (Choose two.)
