Exam Professional Data Engineer topic 1 question 241 discussion

Actual exam question from Google's Professional Data Engineer

Question #: 241
Topic #: 1

[All Professional Data Engineer Questions]

You are designing the architecture of your application to store data in Cloud Storage. Your application consists of pipelines that read data from a Cloud Storage bucket that contains raw data, and write the data to a second bucket after processing. You want to design an architecture with Cloud Storage resources that are capable of being resilient if a Google Cloud regional failure occurs. You want to minimize the recovery point objective (RPO) if a failure occurs, with no impact on applications that use the stored data. What should you do?

A. Adopt multi-regional Cloud Storage buckets in your architecture.
B. Adopt two regional Cloud Storage buckets, and update your application to write the output on both buckets.
C. Adopt a dual-region Cloud Storage bucket, and enable turbo replication in your architecture.
D. Adopt two regional Cloud Storage buckets, and create a daily task to copy from one bucket to the other.

Show Suggested Answer

Suggested Answer: C 🗳️

by scaenruy at Jan. 3, 2024, 2:06 p.m.

Comments

Submit Cancel

raaad

Highly Voted 1 year, 7 months ago

Selected Answer: C

- Dual-region buckets are a specific type of storage that automatically replicates data between two geographically distinct regions. - Turbo replication is an enhanced feature that provides faster replication between the two regions, thus minimizing RPO. - This option ensures that your data is resilient to regional failures and is replicated quickly, meeting the needs for low RPO and no impact on application performance.

upvoted 12 times

...

CGS22

Highly Voted 1 year, 4 months ago

Selected Answer: A

A. Adopt multi-regional Cloud Storage buckets in your architecture. Why A is the best choice: Automatic Cross-Region Replication: Multi-regional buckets automatically replicate data across multiple geographically separated regions within a selected multi-region location (e.g., us). This ensures data redundancy and availability even if one region experiences an outage. Minimal RPO: Data written to a multi-regional bucket is synchronously replicated to at least two regions. This means that in the event of a regional failure, the RPO is essentially zero, as the data is already available in other regions. No Application Changes: Applications can continue reading and writing data to the multi-regional bucket without any modifications, as the cross-region replication is handled transparently by Cloud Storage

upvoted 5 times

mdell

7 months, 3 weeks ago

Minimal yet, but not minimized as stated in the question. That's why C is correct. Turbo replication provides faster redundancy across regions for data in your dual-region buckets, which reduces the risk of data loss exposure and helps support uninterrupted service following a regional outage. When enabled, turbo replication is designed to replicate 100% of newly written objects to the two regions that constitute a dual-region within the recovery point objective of 15 minutes, regardless of object size. Note that even for default replication, most objects finish replication within minutes. https://cloud.google.com/storage/docs/availability-durability#turbo-replication

upvoted 1 times

...

petulda

Most Recent 8 months, 2 weeks ago

Why not A https://cloud.google.com/storage/docs/locations multi regional location has cross region redundancy

upvoted 1 times

1 year, 7 months ago

Selected Answer: A

A. Adopt multi-regional Cloud Storage buckets in your architecture.

upvoted 2 times

datapassionate

1 year, 6 months ago

It wont be a correct answer. Correct is C. It is required "no impact on applications that use the stored data"

upvoted 3 times

ashdam

1 year, 5 months ago

But multi-region is completely transparent for the application if one fails. it would need to fail all EU or US regions. I dont undertand why multi-region would have impact on that

upvoted 1 times

...

datapassionate

1 year, 6 months ago

Whereas with multi-region " it can also introduce unpredictable latency into the response time and higher network egress charges for cloud workloads when multi-region data is read from remote regions" https://cloud.google.com/blog/products/storage-data-transfer/choose-between-regional-dual-region-and-multi-region-cloud-storage

upvoted 4 times

ashdam

1 year, 5 months ago

There is no requirment on latency, just RPO which it would be 0 since multi-region.

upvoted 2 times

...