Question #1484
A company is deploying a high-performance database on multiple Amazon EC2 Nitro-based instances within the same Availability Zone. The database requires block storage that can be attached to multiple instances simultaneously for failover support. The solution must ensure the highest durability and consistent low-latency performance for mission-critical workloads. Which option meets these requirements?
Use General Purpose SSD (gp3) EBS volumes with Amazon EBS Multi-Attach
Use Throughput Optimized HDD (st1) EBS volumes with Amazon EBS Multi-Attach
Use Provisioned IOPS SSD (io2) EBS volumes with Amazon EBS Multi-Attach
Use Cold HDD (sc1) EBS volumes with Amazon EBS Multi-Attach
Explanation
The correct answer is C because:
- Provisioned IOPS SSD (io2) volumes are designed for mission-critical, I/O-intensive workloads with 99.999% durability and consistent sub-millisecond latency, ensuring high performance and reliability.
- EBS Multi-Attach allows the volume to be attached to multiple EC2 instances in the same Availability Zone, enabling failover support.
- Why other options fail:
- A (gp3): While gp3 supports Multi-Attach, it offers lower durability (99.8-99.9%) and less consistent performance compared to io2.
- B (st1) and D (sc1): HDD-based volumes (st1/sc1) do not support Multi-Attach and are unsuitable for low-latency workloads.
Key Points:
- Use io2 for highest durability and performance.
- Multi-Attach is only supported on io1/io2 and gp3 volumes.
- HDD volumes (st1/sc1) are not suitable for high-performance databases.
Answer
The correct answer is: C