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Examine the Data Guard configuration: DGMGRL> show configuration; Configuration - Animals Protection Mode: MaxPerformance Databases: dogs- Primary database sheep - Physical standby database cats- Snapshot standby database Fast-Start Failover: DISABLED Configuration Status: SUCCESS You receive an error while attempting to raise the protection mode to Maximum Protection: DGMGRL> edit configuration set protection mode as maxprotection; Error: ORA-16627: operation disallowed since no standby databases would remain to support protection mode Failed. What can you conclude based on this error?
Correct Answer: D
The error indicates that switching the protection mode to Maximum Protection is not possible due to the presence of a snapshot standby database in the Data Guard configuration, which cannot participate in synchronous redo transport required by the Maximum Protection mode. Therefore, the correct answer is: * D. Cats is a snapshot standby database. Comprehensive Detailed Explanation:In an Oracle Data Guard environment, the Maximum Protection mode requires that all redo data be transmitted synchronously to at least one standby database, ensuring no data loss even in the event of a primary database failure. However, a snapshot standby database, by its nature, allows read-write access and is temporarily disconnected from the redo stream, which makes it unable to participate in the synchronous redo transport required by Maximum Protection mode. The presence of a snapshot standby database in the Data Guard configuration thus prevents the activation of Maximum Protection mode, as it cannot guarantee zero data loss without a standby database capable of receiving redo data synchronously. References:Oracle Data Guard documentation clearly outlines the requirements and restrictions of different protection modes, including the necessity for standby databases to participate in synchronous redo transport to enable Maximum Protection mode. The inability of snapshot standby databases to fulfill this requirement is a key consideration when planning Data Guard configurations and protection levels.
