DOP-C02 Question 197
Single answerA company is designing a disaster recovery (DR) strategy for their web application hosted on AWS. The application is critical and requires minimal downtime in the event of a disaster. They want to maintain a cost-efficient solution that keeps the recovery time objective (RTO) within a few minutes. Which DR strategy should the company implement?
- A
Backup and restore
- B
Pilot light
- C
Warm standby
- D
Multi-site (active-active)
Show answer and explanation
Correct answer: C
Explanation
Warm standby is the most appropriate DR strategy for this scenario because it balances cost-efficiency with a low RTO. It involves running a scaled-down version of the production environment, which can be quickly scaled up to handle the full workload during a disaster. This makes it ideal for applications requiring minimal downtime without the high costs of an active-active setup.
- A. Incorrect.
Backup and restore is the most cost-efficient DR strategy, but it has a high recovery time objective (RTO) and is unsuitable for applications requiring minimal downtime.
- B. Incorrect.
Pilot light keeps a minimal version of the system running at all times. While it offers a quicker RTO than backup and restore, it is less effective than warm standby for achieving recovery within a few minutes.
- C. Correct.
Warm standby maintains a scaled-down version of the fully functional environment running at all times. This allows for quicker scaling in case of a disaster, meeting the requirement of minimal downtime and a low RTO.
- D. Incorrect.
Multi-site (active-active) keeps multiple fully operational environments running in different locations. While it provides the lowest RTO and downtime, it is far more expensive than warm standby and is not described as a cost-efficient solution.