AWS Certified Solutions Architect - Associate
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A company seeks a storage solution for its application. The solution must be highly available and scalable. The solution also must function as a file system be mountable by multiple Linux instances in AWS and on premises through native protocols, and have no minimum size requirements. The company has set up a Site-to-Site VPN for access from its on-premises network to its VPC.
Which storage solution meets these requirements?
Other
Community
UAnonymous
A
Amazon FSx Multi-AZ deployments
B
Amazon Elastic Block Store (Amazon EBS) Multi-Attach volumes
C
Amazon Elastic File System (Amazon EFS) with multiple mount targets
D
Amazon Elastic File System (Amazon EFS) with a single mount target and multiple access points
Explanation:
Explanation
Amazon Elastic File System (Amazon EFS) is the correct solution because it meets all the specified requirements:
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Highly available and scalable: EFS is a fully managed, highly available file storage service that automatically scales up or down as files are added or removed.
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Functions as a file system: EFS provides a file system interface, unlike EBS which is block storage.
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Mountable by multiple Linux instances: EFS can be mounted concurrently by thousands of EC2 instances across multiple Availability Zones.
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Accessible from on-premises: With a Site-to-Site VPN connection, on-premises servers can mount EFS file systems using standard NFS protocols.
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No minimum size requirements: EFS has no minimum storage requirement and you pay only for what you use.
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Multiple mount targets: For high availability across multiple Availability Zones, EFS should have mount targets in each AZ where instances need access.
Why other options are incorrect:
- A. Amazon FSx Multi-AZ deployments: While FSx is a file system, it's typically used for Windows (SMB) or Lustre (high-performance computing), not the best fit for general Linux file sharing.
- B. Amazon EBS Multi-Attach volumes: EBS is block storage, not a file system, and while Multi-Attach allows multiple instances to attach to a volume, they need to use a clustered file system, and it doesn't support on-premises access.
- D. EFS with a single mount target: A single mount target creates a single point of failure and doesn't provide high availability across multiple AZs.
Key AWS Services Comparison:
- EFS: Network File System (NFS) for Linux workloads, multi-AZ by default, accessible from on-premises via VPN/Direct Connect
- EBS: Block storage for single EC2 instances (except Multi-Attach), not accessible from on-premises
- FSx: Managed file services for Windows (SMB) or Lustre (HPC)
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