A retail company needs its on-premises point-of-sale (POS) servers to have low-latency access to product information while keeping the full and growing inventory dataset stored durably in the AWS Cloud. They also want recently accessed files to remain cached locally for fast reads. Which AWS service best meets these requirements?
AWS Storage Gateway (File Gateway)
Amazon S3 with cross-Region replication
Amazon FSx for Lustre
Amazon RDS for PostgreSQL with Multi-AZ read replicas
AWS Storage Gateway configured as a File Gateway creates an NFS or SMB file share that the POS servers can mount. The gateway keeps recently accessed data in a local cache while storing the authoritative copy in Amazon S3, giving the required low-latency access without sacrificing durability or scalability.
Amazon S3 with cross-Region replication stores objects entirely in the cloud and does not provide an on-premises cache. Amazon FSx for Lustre is a high-performance parallel file system intended for HPC and does not automatically cache data locally for branch offices. Amazon RDS Multi-AZ with read replicas addresses database availability and read scaling, not hybrid file storage.
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