AWS Certified Solutions Architect - Associate
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A company uses an EC2 instance with an EBS volume for a web application. To enhance scalability and availability, they replicated the setup in another Availability Zone and used an Application Load Balancer. Users now see only a subset of documents on each refresh. What solution should be proposed to display all documents?
A company uses an EC2 instance with an EBS volume for a web application. To enhance scalability and availability, they replicated the setup in another Availability Zone and used an Application Load Balancer. Users now see only a subset of documents on each refresh. What solution should be proposed to display all documents?
Explanation:
The correct answer is C: 'Migrate data to Amazon EFS and update the application to use EFS for document storage'. This is because Amazon EFS (Elastic File System) is a fully managed, scalable, and highly available storage solution. It provides shared access to the same file system from multiple EC2 instances, which solves the issue of data inconsistency between EBS volumes in different Availability Zones. By moving the user-uploaded documents to EFS, both EC2 instances can access the same set of files, ensuring that users see all documents regardless of which instance the Application Load Balancer directs them to.