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AWS Certified Solutions Architect - Associate · AWS
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EFS files cannot be stored for more than 365 days even with lifecycle policies. S3 is the most suitable option here.
A. EBS provides block-level storage volumes for use with EC2 instances. While it offers durability and persistence, it is not the most cost-effective solution for long-term retention of log files. Additionally, it does not provide concurrent access to the files, which is a requirement in this scenario. B. EFS is a scalable file storage service that can be mounted on multiple EC2 instances concurrently. While it provides concurrent access to files, it may not be the most cost-effective option for long-term retention due to its higher pricing compared to S3. C. The instance store is a temporary storage option that is physically attached to the EC2 instance. It does not provide the durability and long-term retention required for compliance purposes. Additionally, the instance store is not accessible outside of the specific EC2 instance it is attached to, so concurrent access by the reporting tool would not be possible.
this sounds like an expensive solution but if necessary then S3 would be the best