Exam Professional Cloud Database Engineer topic 1 question 149 discussion

Actual exam question from Google's Professional Cloud Database Engineer

Question #: 149
Topic #: 1

[All Professional Cloud Database Engineer Questions]

You are migrating your critical production database from Amazon RDS for MySQL to Cloud SQL for MySQL by using Google Cloud's Database Migration Service. You want to keep disruption to your production database to a minimum and, at the same time, optimize migration performance. What should you do?

A. Create and start multiple Database Migration Service jobs to migrate your database to the target Cloud SQL for MySQL instance.
B. Upgrade the Amazon RDS for MySQL primary instance to an instance with more vCPUs and memory, and then run Google Cloud's Database Migration Service.
C. Create a single Database Migration Service migration job with initial load parallelism configured to maximum on the source Amazon RDS for MySQL read replica.
D. Create a single Database Migration Service migration job with initial Load Parallelism configured to Maximum on the Amazon RDS for MySQL primary instance.

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Suggested Answer: C 🗳️

by WOOJONE at May 29, 2025, 1:07 a.m.

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Skywatch

2 weeks, 2 days ago

Selected Answer: C

Option C is the only one that correctly balances both requirements. It uses a read replica to protect the production primary from the heavy initial load and uses load parallelism on that replica to ensure the migration happens as quickly as possible.

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