DBS-C01 Deployment and Migration Practice Question
A company is migrating a self-hosted Cassandra cluster to Amazon Keyspaces (for Apache Cassandra). The cluster has 10 nodes and handles 50,000 writes per second. Which migration strategy is MOST efficient?
⚠ Common exam trap
Test-takers frequently assume AWS DMS or Glue are universal migration tools, but they fail to recognize that Keyspaces supports the Cassandra wire protocol natively, making datacenter replication the most efficient and least disruptive method for high-throughput workloads.
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
✓
Set up Keyspaces as a new datacenter in the existing Cassandra cluster using native replication.
Setting up Amazon Keyspaces as a new datacenter in the existing Cassandra cluster using native replication allows for a live, zero-downtime migration. Cassandra's native replication protocol handles the 50,000 writes per second incrementally, automatically replicating data from the existing cluster to Keyspaces without requiring an export/import step or additional ETL tools.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Set up Keyspaces as a new datacenter in the existing Cassandra cluster using native replication.
Why this is correct
Allows live migration with minimal downtime.
- ✗
Export data using CQL COPY and import into Keyspaces.
Why it's wrong here
Not efficient for high throughput, causes downtime.
- ✗
Use AWS Glue to extract data from Cassandra and write to Keyspaces.
Why it's wrong here
Glue is for ETL, not real-time migration.
- ✗
Use AWS DMS with Cassandra as source and Keyspaces as target.
Why it's wrong here
DMS does not support Cassandra as a source.
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Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.