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In Google Cloud SQL, what is the primary benefit of deploying a read replica?

easy📝 Conceptual Q1 of 15
GCP - Cloud SQL and Databases

In Google Cloud SQL, what is the primary benefit of deploying a read replica?

ATo enable write scaling across multiple instances
BTo provide a backup for disaster recovery
CTo offload read traffic and improve query performance
DTo automatically upgrade the primary instance
Step-by-Step Solution
Solution:
  1. Step 1: Understand read replica purpose

    Read replicas are designed to handle read-only queries, reducing load on the primary instance.
  2. Step 2: Identify benefits

    This improves read query performance and scalability without affecting writes.
  3. Final Answer:

    To offload read traffic and improve query performance -> Option C
  4. Quick Check:

    Read replicas handle reads, not writes or backups [OK]
Quick Trick: Read replicas improve read scalability, not writes or backups [OK]
Common Mistakes:
  • Confusing read replicas with backups
  • Assuming read replicas handle writes
  • Thinking read replicas automatically upgrade primaries

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