AWS Certified Solutions Architect - Associate
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An application uses an Amazon RDS MySQL DB instance. The RDS database is becoming low on disk space. A solutions architect wants to increase the disk space without downtime.
Which solution meets these requirements with the LEAST amount of effort?
Other
Community
UAnonymous
A
Enable storage autoscaling in RDS
B
Increase the RDS database instance size
C
Change the RDS database instance storage type to Provisioned IOPS
D
Back up the RDS database, increase the storage capacity, restore the database, and stop the previous instance
Explanation:
Explanation
Correct Answer: A - Enable storage autoscaling in RDS
Amazon RDS Storage Autoscaling automatically scales storage capacity when needed, without requiring downtime. Here's why this is the best solution:
Key Benefits:
- No Downtime: Storage autoscaling works seamlessly without interrupting database operations
- Least Effort: Simply enable the feature - no manual intervention required
- Automatic: Monitors storage usage and scales automatically when needed
- Cost-Effective: Only pays for additional storage when actually used
Why Other Options Are Not Optimal:
B. Increase the RDS database instance size
- This changes the instance class (CPU/RAM), not just storage
- May cause downtime during instance modification
- More complex than just increasing storage
C. Change the RDS database instance storage type to Provisioned IOPS
- This changes storage performance characteristics, not capacity
- Doesn't solve the low disk space issue
- May require downtime depending on the change
D. Back up the RDS database, increase the storage capacity, restore the database, and stop the previous instance
- This involves significant manual effort
- Requires downtime during backup/restore operations
- Most complex and time-consuming approach
How RDS Storage Autoscaling Works:
- You set a maximum storage threshold
- RDS monitors storage usage
- When storage consumption reaches the autoscaling threshold, RDS automatically increases storage
- The process is transparent to applications
Best Practices:
- Enable storage autoscaling proactively for production databases
- Set appropriate maximum storage limits to control costs
- Monitor storage growth patterns to understand usage trends
This solution perfectly meets the requirements of increasing disk space without downtime with the least amount of effort.
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