SAA-C03 Question 405
Select 2An e-commerce company is running a high-transactional web application on Amazon EC2 instances. The application requires low latency and high IOPS for its database, while log files for audit purposes need a cost-effective storage solution. Which combination of Amazon Elastic Block Store (EBS) volume types should the company choose?
- A
Provisioned IOPS SSD (io2) for the database and Cold HDD (sc1) for the logs
- B
General Purpose SSD (gp3) for the database and Throughput Optimized HDD (st1) for the logs
- C
Provisioned IOPS SSD (io1) for the database and Throughput Optimized HDD (st1) for the logs
- D
General Purpose SSD (gp2) for the database and Cold HDD (sc1) for the logs
- E
Provisioned IOPS SSD (io2) for the database and General Purpose SSD (gp3) for the logs
Show answer and explanation
Correct answers: A, C
Explanation
For a high-transactional database, Provisioned IOPS SSD volumes (io1 or io2) are the best choice due to their ability to deliver high performance and low latency. For log files, which require high throughput and are write-intensive, Throughput Optimized HDD (st1) is a cost-effective solution. This combination ensures optimal performance for critical database operations while keeping costs low for log storage.
- A. Correct.
Provisioned IOPS SSD (io2) is designed for applications requiring low latency and high IOPS, making it suitable for the database. Cold HDD (sc1) is the lowest-cost EBS volume type and is not ideal for logs that need faster throughput.
- B. Incorrect.
General Purpose SSD (gp3) provides a good balance of cost and performance for general workloads but may not provide sufficient IOPS for a high-transactional database. However, Throughput Optimized HDD (st1) is suitable for log storage due to its high throughput.
- C. Correct.
Provisioned IOPS SSD (io1) is a good choice for a high-transactional database requiring consistent and high IOPS, while Throughput Optimized HDD (st1) is ideal for storing log files due to its cost-effectiveness and high throughput.
- D. Incorrect.
General Purpose SSD (gp2) might work for moderate workloads but does not provide the performance needed for a high-transactional database. Cold HDD (sc1) is too slow for log files that require consistent throughput.
- E. Incorrect.
Provisioned IOPS SSD (io2) is an excellent choice for the database, but using General Purpose SSD (gp3) for logs would be unnecessarily costly compared to HDD options like st1.