Q81 — AWS SAA-C03 Ch.17

Question 81 of 89 | ← Chapter 17

Q1381. A company is planning to deploy a business-critical application in the AWS Cloud. The application requires durable storagewith consistent, low-latency performance.Which type of storage should a solutions architect recommend to meet these requirements?

Correct Answer: C. Provisioned IOPS SSD Amazon EBS volume

Explanation

Let's analyze each option based on the requirements of durable storage with consistent, low - latency performance for a business - critical application:Option A: Instance store volumeDurability: Instance store volumes provide temporary block - level storage for an EC2 instance. The data on an instance store volume persists only during the life of the associated EC2 instance. If the instance is stopped, terminated, or fails, the data on the instance store volume is lost. So, it does not offer the durability required for a business - critical application. Performance: While instance store volumes can offer high - speed, low - latency access to data when the instance is running, the lack of durability makes it an unsuitable choice for this scenario.Option B: Amazon ElastiCache (Memcached) clusterPurpose: Amazon ElastiCache is a web service that makes it easy to deploy, operate, and scale an in - memory cache in the cloud. Memcached is an in - memory key - value store that is used for caching frequently accessed data to improve application performance. Durability: It is an in - memory caching solution, and data is lost if the cache nodes fail or are restarted. It is not designed for long - term, durable storage of business - critical data. Its main focus is on reducing the latency of data access by keeping data in memory, not on providing durable storage.Option C: Provisioned IOPS SSD Amazon EBS volumeDurability: Amazon Elastic Block Store (EBS) volumes are designed for durability. Provisioned IOPS SSD (io1 or io2) volumes are highly durable and can withstand the loss of an Availability Zone. They are replicated within an Availability Zone to protect against individual component failures. Performance: These volumes are specifically designed for applications that require consistent, low - latency performance. You can provision the number of IOPS (input/output operations per second) that you need, up to 64,000 IOPS for io1 and 256,000 IOPS for io2 volumes (in some cases). This allows you to fine - tune the performance to meet the requirements of your business - critical application.Option D: Throughput Optimized HDD Amazon EBS volumeDurability: Similar to other EBS volume types, Throughput Optimized HDD (st1) volumes offer durability within an Availability Zone. However, their main characteristic is optimized for throughput rather than low - latency performance.Performance: st1 volumes are designed for workloads that require high sequential read and write operations, such as big data, data warehouses, and log processing. They do not provide the consistent, low- latency performance required by a business - critical application that may have a mix of random and sequential I/O operations.Based on the above analysis, the solutions architect should recommend a Provisioned IOPS SSD Amazon EBS volume to meet the requirements of durable storage with consistent, low - latency performance. So the answer is C.