Questions 16 to 18

Question 16

An organization is planning its disaster recovery solution. They would like to keep their core business-critical systems running in the cloud. Other services can be replicated but are switched off.

Which DR strategy should a solutions architect recommend?

1. Backup and restore
2. Pilot light
3. Warm standby
4. Multi-site

Correct Answer: 3

Explanation: The term warm standby is used to describe a DR scenario in which a scaled-down version of a fully functional environment is always running in the cloud. A warm standby solution extends the pilot light elements and preparation.

It further decreases the recovery time because some services are always running. By identifying your business-critical systems, you can fully duplicate these systems on AWS and have them always on.

INCORRECT: “Backup and restore” is incorrect. This is the lowest cost DR approach that simply entails creating online backups of all data and applications.

INCORRECT: "Pilot light" is incorrect. With a pilot light strategy, a core minimum of services are running and the remainder are only brought online during a disaster recovery situation.

CORRECT: “Warm standby” is the correct answer.

INCORRECT: “Multi-site” is incorrect. A multi-site solution runs on AWS as well as on your existing on-site infrastructure in an active-active configuration.

References: https://aws.amazon.com/blogs/publicsector/rapidly-recover-mission-critical-systems-in-a-disaster/