A company plans to migrate a legacy application to AWS. The application currently uses NFS to connect to an on-premises storage system to store application data. The application cannot be changed to use protocols other than NFS. Which storage solution should a solutions architect recommend after migration?
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Correct answer: Amazon Elastic File System (Amazon EFS).
Why this is the answer
Amazon EFS is the correct choice because it provides a fully managed, scalable, and highly available NFS file system that can be mounted by EC2 instances. This allows the legacy application to continue using NFS without modification. AWS DataSync is a data transfer service, not a persistent storage solution for applications. Amazon EBS provides block storage, which is not compatible with NFS. Amazon EMRFS is an implementation of HDFS for Amazon EMR and is not a general-purpose NFS file system.
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