SAP-C03 practice question: DR strategies, RTO/RPO and Elastic Disaster Recovery (1 of 2)

Resilience, Migration, and Business Continuity A free question from our original SAP-C03 practice exam. Try it, then open the answer to see why each option is right or wrong.

A manufacturer runs its ERP system on 40 virtual machines in a VMware data center. The disaster recovery requirement is a recovery time objective of four hours and a recovery point objective of 15 minutes, and the finance team will not fund a second copy of the full environment running all the time.

The ERP system must be recoverable in an AWS Region when the data center is lost, and the recovery must be rehearsed without disrupting production.

Which solution meets these requirements at the LOWEST cost?

Choose one answer.

A. Copy the nightly backups of the virtual machines to a bucket in the recovery Region, and restore them from those copies after a disaster.
B. Use AWS Elastic Disaster Recovery to replicate the 40 machines continuously to a staging area in the recovery Region. Launch recovery instances during a disaster and run scheduled drills.
C. Run a full copy of the ERP environment in the recovery Region at all times, with the same instance sizes and databases as production, so that failover is nearly instant.
D. Build a second data center in the recovery Region with a leased circuit, and keep the spare hardware powered on so that the team can restore onto it.

Show the answer and explanation

Answer: B

A. Wrong: Nightly copies leave up to a day of data at risk, which breaks the 15-minute recovery point objective. Restoring the environment from scratch also takes longer than the four-hour target allows.
B. Right: Correct. Continuous replication keeps data within the 15-minute point, and recovery instances launch from the staging copies within the four-hour target. Only the replication staging resources run until a disaster, and drills run without touching production.
C. Wrong: The duplicate environment meets the targets, but running it all the time is the full cost the finance team will not fund. The option is more than the objectives require.
D. Wrong: Leased hardware and a circuit in a second site are fixed costs that the AWS recovery options avoid. The option also does not rehearse recovery in the cloud.

Explanation

Elastic Disaster Recovery meets the 15-minute and four-hour targets with continuous replication and only staging resources running until a disaster, and it supports drills. Nightly copies miss the recovery point, while a full standby environment or a leased second site costs more than the objectives need.

SAP-C03 practice question: DR strategies, RTO/RPO and Elastic Disaster Recovery (1 of 2)

Explanation

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