You have a Standard Tier Memorystore for Redis instance deployed in a production environment. You need to simulate a Redis instance failover in the most accurate disaster recovery situation, and…

Question

Options

• ACreate a Standard Tier Memorystore for Redis instance in the development environment. Initiate a manual failover by using the limited-data-loss data
• BCreate a Standard Tier Memorystore for Redis instance in a development environment. Initiate a manual failover by using the force-data-loss data protection
• CIncrease one replica to Redis instance in production environment. Initiate a manual failover by using the force-data-loss data protection mode.
• DInitiate a manual failover by using the limited-data-loss data protection mode to the Memorystore for Redis instance in the production environment.

• A
  3% (1)
• B
  75% (24)
• C
  9% (3)
• D
  13% (4)

Explanation

Option B is correct because it satisfies both requirements simultaneously: using a development environment isolates the test from production (protecting production data), while force-data-loss mode is the most accurate DR simulation because it triggers failover regardless of replication lag - mirroring what actually happens in a real disaster where a primary node suddenly becomes unavailable.

Option A fails on accuracy: limited-data-loss only initiates failover if the replica is within a safe replication lag threshold, which is too controlled to simulate a true disaster scenario. Real disasters don't wait for replication to catch up.

Option C fails on safety: running force-data-loss against the production instance directly risks losing production data, violating the core constraint of the question.

Option D fails on both counts: it targets the production environment (risking production data) and uses limited-data-loss mode (not the most accurate DR simulation).

Memory tip: Map the two requirements to the two parts of the answer - "no production impact" → dev environment, "most accurate DR" → force-data-loss (because real disasters are forced, not gentle). When both requirements appear, you need both conditions satisfied, which only B provides.

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