Question #930
A company needs to design a disaster recovery (DR) solution for an application hosted in their on-premises data center. The application writes data to two SMB file shares: one for transaction logs and another for media files. Both file shares are located in the data center. The company wants to store a secondary copy of the data on AWS, which must be accessible via SMB from either the data center or AWS during a disaster. The secondary copy is infrequently accessed but must be retrievable within 5 minutes when needed.
Which solution meets these requirements?
Deploy AWS Outposts with Amazon S3 storage. Use a Windows EC2 instance on Outposts as a file server to host the secondary copy.
Deploy an Amazon FSx File Gateway. Configure an Amazon FSx for Windows File Server Multi-AZ file system with SSD storage for both transaction logs and media files.
Deploy an Amazon S3 File Gateway. Configure the gateway to store transaction logs in Amazon S3 Standard-Infrequent Access (S3 Standard-IA) and media files in S3 Glacier Deep Archive.
Deploy an Amazon S3 File Gateway. Configure the gateway to store both transaction logs and media files in Amazon S3 Standard-Infrequent Access (S3 Standard-IA).
Explanation
Option D is correct because:
- Amazon S3 File Gateway provides SMB access to data stored in Amazon S3, fulfilling the requirement for accessibility from both on-premises and AWS.
- S3 Standard-IA offers millisecond retrieval times, ensuring data is available within 5 minutes during a disaster.
- It is cost-effective for infrequently accessed data compared to pricier solutions like FSx (Option B) or Outposts (Option A).
Why other options fail:
- A: Outposts hosts AWS infrastructure on-premises, which does not align with storing data on AWS. S3 via EC2 adds unnecessary complexity.
- B: FSx for Windows with SSD is expensive for infrequent access and overkill for the retrieval requirement.
- C: S3 Glacier Deep Archive has retrieval times exceeding 12 hours, violating the 5-minute requirement.
Key Points:
- Use S3 File Gateway for SMB access to S3.
- S3 Standard-IA balances cost and retrieval speed for infrequent access.
- Avoid Glacier Deep Archive if rapid retrieval is required.
Answer
The correct answer is: D