DBS-C01 Management and Operations Practice Question
A company is using Amazon DynamoDB with global tables. The company wants to monitor replication latency between regions. Which CloudWatch metric should the company use?
⚠ Common exam trap
Watch out — candidates often confuse DynamoDB's ReplicationLatency with RDS's ReplicaLag, as both involve cross-region replication but apply to entirely different services and metrics.
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
✓
ReplicationLatency
The correct metric is ReplicationLatency, which measures the time elapsed between an update in the source region and its appearance in the replica region for DynamoDB global tables. This metric directly reflects the replication lag between regions, making it the appropriate choice for monitoring cross-region replication performance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GlobalTableReplicationLag
Why it's wrong here
Not a standard metric.
- ✗
ReplicaLag
Why it's wrong here
This is for RDS read replicas.
- ✗
WriteThrottleEvents
Why it's wrong here
This measures throttling, not replication.
- ✓
ReplicationLatency
Why this is correct
This metric tracks replication lag.
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Written by Johnson Ajibi, MSc IT Security
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