Question 309 of 1,446
PCDE Practice Question: Manage a solution that can span multiple database technologies
A Cloud Memorystore for Redis instance needs to ensure data is not lost during a maintenance event. The team decides to enable persistence. However, Memorystore does not support Redis persistence. What is the recommended alternative?
⚠ Common exam trap
The Google Cloud Professional Data Engineer exam often tests the misconception that Cloud Memorystore supports all native Redis features, including persistence commands like BGSAVE or CONFIG SET appendonly yes, when in fact these are explicitly disabled in the managed service.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the Standard tier with replication and take regular snapshots to Cloud Storage using a scheduled script.
Cloud Memorystore for Redis does not support native Redis persistence (RDB or AOF). To prevent data loss during maintenance events, the recommended alternative is to use the Standard tier (which provides replication and automatic failover) and supplement it with scheduled snapshots exported to Cloud Storage. This approach ensures a durable backup outside the Redis instance that can be restored if needed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use the Standard tier with replication and take regular snapshots to Cloud Storage using a scheduled script.
Why this is correct
Standard tier provides replication; snapshots to Cloud Storage provide persistency.
- ✗
Migrate to Cloud SQL for MySQL and use its backup feature.
Why it's wrong here
Not a cache solution.
- ✗
Enable AOF persistence in Memorystore.
Why it's wrong here
Memorystore does not support persistence.
- ✗
Increase the maxmemory setting and rely on the allkeys-lru eviction policy.
Why it's wrong here
Eviction does not provide persistence.
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Last reviewed: Jul 4, 2026
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