AWS Certified Solutions Architect - Associate
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A company is planning to deploy a business-critical application in the AWS Cloud. The application requires durable storage with consistent, low-latency performance.
Which type of storage should a solutions architect recommend to meet these requirements?
Other
Community
UAnonymous
A
Instance store volume
B
Amazon ElastiCache for Memcached cluster
C
Provisioned IOPS SSD Amazon Elastic Block Store (Amazon EBS) volume
D
Throughput Optimized HDD Amazon Elastic Block Store (Amazon EBS) volume
Explanation:
Explanation
Provisioned IOPS SSD Amazon EBS volume is the correct choice because:
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Durable Storage: Amazon EBS volumes are designed for durability with automatic replication within an Availability Zone, providing 99.999% availability.
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Consistent, Low-Latency Performance: Provisioned IOPS SSD (io1/io2) volumes are specifically designed for I/O-intensive workloads that require consistent, low-latency performance. They allow you to provision a specific number of IOPS (Input/Output Operations Per Second) independent of volume size.
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Business-Critical Application: EBS volumes are suitable for business-critical applications as they provide persistent storage that survives instance termination.
Why the other options are incorrect:
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A. Instance store volume: While instance store volumes can provide high performance, they are ephemeral (not durable) - data is lost when the instance is stopped or terminated. They don't meet the durability requirement.
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B. Amazon ElastiCache for Memcached cluster: This is an in-memory caching service, not durable storage. Data in ElastiCache is volatile and can be lost if nodes fail or are restarted.
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D. Throughput Optimized HDD Amazon EBS volume: These are designed for large, sequential workloads (like big data, data warehouses) but have higher latency and are not optimized for low-latency, random I/O operations that typical business-critical applications require.
Key AWS Concepts:
- EBS Volume Types:
- Provisioned IOPS SSD (io1/io2): High performance, low latency, consistent I/O
- General Purpose SSD (gp2/gp3): Balanced price and performance
- Throughput Optimized HDD (st1): Low-cost HDD for throughput-intensive workloads
- Cold HDD (sc1): Lowest cost for infrequently accessed data
For business-critical applications requiring both durability and consistent low-latency performance, Provisioned IOPS SSD EBS volumes are the recommended solution.
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