What are three purposes of the RMAN "FROM SERVICE" clause?

Question

Options

• Ato support file restoration over the network in a Data Guard environment
• Bto support PUSH-based active database duplication
• Cto support file recovery over the network in a Data Guard environment
• Dto support synchronization of a standby database with the primary database in a Data Guard
• Eto support active database duplication by taking image copies of the source database

• A
  3% (1)
• B
  6% (2)
• C
  91% (32)

Explanation

The RMAN FROM SERVICE clause specifies a net service name that RMAN uses to connect to a remote database to pull data across the network. Choice A is false: FROM SERVICE is not used for standalone file restoration (RESTORE command) in a Data Guard environment as a primary purpose - restoration in that context typically uses a backup repository, not a live service connection. Choice B is false: FROM SERVICE supports PULL-based active database duplication, where the auxiliary (duplicate) instance connects back to the target service and pulls the datafiles toward itself. PUSH-based duplication is a different mechanism where the target pushes datafiles to the auxiliary; FROM SERVICE is not the clause used for that approach. Choice C is true: RECOVER ... FROM SERVICE allows RMAN to recover datafiles by fetching them directly from a live primary or standby database service over the network, bypassing the need for a traditional backup. This is especially useful in Data Guard environments where the primary or another standby can serve as the recovery source. Choice D is true: FROM SERVICE enables a standby database to be synchronized (refreshed) with its primary by pulling missing or current datafiles and archived redo logs directly from the primary service, avoiding the need for physical backup media. Choice E is true: active database duplication using FROM SERVICE works by having RMAN take image copies of the source database's datafiles over the network in real time and ship them to the duplicate target, making it a network-based, backup-free duplication method.

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