Your company is designing its application landscape on Compute Engine. Whenever a zonal outage occurs, the application should be restored in another zone as quickly as possible with the latest application data. You need to design the solution to meet this requirement. What should you do?
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Correct answer: Configure the Compute Engine instances with an instance template for the application, and use a regional persistent disk for the application data. Whenever a zonal outage occurs, use the instance template to spin up the application in another zone in the same region. Use the regional persistent disk for the application data..
Why this is the answer
The correct option ensures high availability and quick recovery from zonal outages. Using an instance template allows for rapid deployment of the application in a new zone. A regional persistent disk provides synchronous replication of data across two zones in the same region, meaning the data is immediately available in the alternate zone without needing to restore from a snapshot, thus meeting the requirement for the "latest application data." The first incorrect option is wrong because restoring to the same zone during a zonal outage is impossible. The third incorrect option is less efficient than regional persistent disks because restoring from a snapshot takes longer and might not have the absolute latest data. The fourth incorrect option is incorrect because regional persistent disks are tied to a specific region and cannot be used directly in another region.
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