AWS Certified Solutions Architect - Associate
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A social media company is building a feature for its website. The feature will give users the ability to upload photos. The company expects significant increases in demand during large events and must ensure that the website can handle the upload traffic from users.
Which solution meets these requirements with the MOST scalability?
Other
Community
UAnonymous
A
Upload files from the user's browser to the application servers. Transfer the files to an Amazon S3 bucket.
B
Provision an AWS Storage Gateway file gateway. Upload files directly from the user's browser to the file gateway.
C
Generate Amazon S3 presigned URLs in the application. Upload files directly from the user's browser into an S3 bucket.
D
Provision an Amazon Elastic File System (Amazon EFS) file system. Upload files directly from the user's browser to the file system.
Explanation:
Explanation
Option C is the most scalable solution because it uses Amazon S3 presigned URLs to allow direct uploads from users' browsers to S3, bypassing the application servers entirely.
Why Option C is correct:
- Direct upload to S3: With presigned URLs, users upload files directly to Amazon S3, eliminating the need for application servers to handle file upload traffic.
- Automatic scalability: Amazon S3 automatically scales to handle massive amounts of upload traffic without any provisioning.
- Reduced load on application servers: By offloading file uploads to S3, the application servers can focus on processing business logic.
- Cost-effective: No need to over-provision application servers to handle upload spikes.
- High availability: S3 provides 99.999999999% durability and 99.99% availability.
Why other options are less scalable:
Option A: Uploading to application servers first creates a bottleneck - application servers would need to be scaled to handle upload traffic, which is inefficient and expensive.
Option B: AWS Storage Gateway is designed for hybrid cloud storage, not for direct web uploads at scale. It's not optimized for handling massive concurrent uploads from web browsers.
Option D: Amazon EFS is a network file system that requires mounting to EC2 instances. Direct browser uploads to EFS are not supported, and even if they were, EFS doesn't scale as automatically or cost-effectively as S3 for this use case.
Key AWS Services:
- Amazon S3 Presigned URLs: Time-limited URLs that grant temporary access to upload objects directly to S3 buckets
- Amazon S3: Object storage service with virtually unlimited scalability and high durability
This architecture pattern is commonly used for media uploads, file sharing, and other scenarios requiring scalable file upload capabilities.
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