Amazon Aurora Global Database for Sub-10ms Global Relational Reads
A company is designing a global e-commerce application that requires a relational database with sub-10ms read latency across multiple AWS Regions. The database will store inventory and product catalog data. Which database design should they choose?
Quick Answer
The answer is Amazon Aurora Global Database, which is the correct choice because it delivers sub-10ms global reads by placing secondary clusters in other AWS Regions that replicate asynchronously from a primary cluster using dedicated storage-based replication. This storage-level replication avoids impacting primary cluster performance and typically achieves under one second of lag, making it ideal for a global e-commerce application requiring low-latency relational reads for inventory and product catalog data. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of global database architectures for latency-sensitive workloads, often appearing as a trap where candidates mistakenly choose multi-Region read replicas or cross-Region snapshot restores—both of which lack the single-digit millisecond read performance and automatic replication of Aurora Global Database. Remember the memory tip: “Global Aurora, local reads—storage replication, not compute feeds.”
⚠ Common exam trap
Watch out — candidates often confuse Multi-AZ or Cross-Region Read Replicas with true global low-latency read scaling, not realizing that Aurora Global Database is the only option that provides dedicated secondary clusters with storage-based replication for sub-10ms reads across Regions.
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 Amazon Aurora Global Database with a primary cluster in one Region and secondary clusters in other Regions.
Amazon Aurora Global Database is designed for low-latency global reads, with typical replication lag of under 1 second and read latency in the single-digit milliseconds from secondary clusters. It uses a dedicated storage-based replication mechanism that does not impact the performance of the primary cluster, making it ideal for a global e-commerce application requiring sub-10ms reads across multiple AWS Regions.
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 Amazon DynamoDB Global Tables with eventual consistency.
Why it's wrong here
DynamoDB is NoSQL, not relational.
- ✗
Deploy Multi-AZ for Amazon RDS and use Route 53 latency-based routing.
Why it's wrong here
Multi-AZ is for high availability in one Region.
- ✗
Set up Cross-Region Read Replicas for Amazon RDS MySQL.
Why it's wrong here
Cross-Region replicas may have higher replication lag and latency.
- ✓
Use Amazon Aurora Global Database with a primary cluster in one Region and secondary clusters in other Regions.
Why this is correct
Aurora Global Database offers low-latency global reads.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Same concept, more angles
1 more way this is tested on DBS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is designing a relational database for an e-commerce application that requires high availability and automated failover across AWS Regions. Which AWS database service should they use?
medium- A.Amazon DynamoDB Global Tables
- B.Amazon RDS with Multi-AZ deployment
- ✓ C.Amazon Aurora Global Database
- D.Amazon Redshift with cross-Region snapshot copy
Why C: Amazon Aurora Global Database is the correct choice because it is designed for cross-Region disaster recovery and high availability, replicating data with a typical latency of under one second across multiple AWS Regions. It supports automated failover from the primary Region to one of the secondary Regions, meeting the requirement for automated cross-Region failover without manual intervention.
JA
Written by Johnson Ajibi, MSc IT Security
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.