Google Cloud Professional Data Engineer — Question 175

You have designed an Apache Beam processing pipeline that reads from a Pub/Sub topic. The topic has a message retention duration of one day, and writes to a Cloud Storage bucket. You need to select a bucket location and processing strategy to prevent data loss in case of a regional outage with an RPO of 15 minutes. What should you do?

Answer options

• A. 1. Use a dual-region Cloud Storage bucket. 2. Monitor Dataflow metrics with Cloud Monitoring to determine when an outage occurs. 3. Seek the subscription back in time by 15 minutes to recover the acknowledged messages. 4. Start the Dataflow job in a secondary region.
• B. 1. Use a multi-regional Cloud Storage bucket. 2. Monitor Dataflow metrics with Cloud Monitoring to determine when an outage occurs. 3. Seek the subscription back in time by 60 minutes to recover the acknowledged messages. 4. Start the Dataflow job in a secondary region.
• C. 1. Use a regional Cloud Storage bucket. 2. Monitor Dataflow metrics with Cloud Monitoring to determine when an outage occurs. 3. Seek the subscription back in time by one day to recover the acknowledged messages. 4. Start the Dataflow job in a secondary region and write in a bucket in the same region.
• D. 1. Use a dual-region Cloud Storage bucket with turbo replication enabled. 2. Monitor Dataflow metrics with Cloud Monitoring to determine when an outage occurs. 3. Seek the subscription back in time by 60 minutes to recover the acknowledged messages. 4. Start the Dataflow job in a secondary region.

Correct answer: D

Explanation

The correct answer is D because a dual-region Cloud Storage bucket with turbo replication provides high availability and redundancy, ensuring data is safe during a regional outage. The other options either do not meet the RPO requirement or do not offer sufficient redundancy to prevent data loss during outages.