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Exam Professional Data Engineer topic 1 question 242 discussion

Actual exam question from Google's Professional Data Engineer
Question #: 242
Topic #: 1
[All Professional Data Engineer Questions]

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?

  • 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.
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Suggested Answer: D 🗳️
by scaenruy at Jan. 3, 2024, 2:15 p.m.

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datapassionate
Highly Voted 5 months, 1 week ago
Selected Answer: D
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. RPO of 15 minutes is guaranteed when turbo replication is used https://cloud.google.com/storage/docs/availability-durability
upvoted 7 times
ashdam
4 months ago
Why multi-region is not correct. There is no downtime in case a region goes down.
upvoted 1 times
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JyoGCP
Highly Voted 4 months ago
Selected Answer: D
Option D is correct. Not A, because dual-region bucket WITHOUT turbo replication takes atleast 1 hour to sync data between regions. SLA for 100% data sync is 12 hours as per google.
upvoted 5 times
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shangning007
Most Recent 1 day, 20 hours ago
Selected Answer: A
I don't like answer D. If we have turbo replication can ensure that change within 15min can be replicated, why do we still need to seek the subscription back in time by 60min?
upvoted 1 times
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SVGoogle89
1 month, 1 week ago
D https://cloud.google.com/storage/docs/availability-durability#cross-region-redundancy
upvoted 1 times
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lipa31
5 months ago
Selected Answer: D
https://cloud.google.com/storage/docs/availability-durability#turbo-replication says : "When enabled, turbo replication is designed to replicate 100% of newly written objects to both regions that constitute the dual-region within the recovery point objective of 15 minutes, regardless of object size." so seems D to me
upvoted 4 times
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raaad
5 months, 2 weeks ago
Selected Answer: A
- Low RPO: Dual-region buckets offer synchronous replication, ensuring data is immediately available in both regions, aligning with the 15-minute RPO. - Turbo Replication: enabling turbo replication can further reduce replication latency to near-real-time for even stricter RPO requirements. - Resilient Data Storage: Dual-region buckets ensure data availability even during regional outages, protecting processed data. - Fast Recovery: Reprocessing from the last 15 minutes of acknowledged messages minimizes data loss and downtime.
upvoted 1 times
qq589539483084gfrgrgfr
5 months ago
why not D then, if turbo replication improves RPO??
upvoted 2 times
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scaenruy
5 months, 3 weeks ago
Selected Answer: A
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.
upvoted 1 times
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C (25%)
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