A company is deploying a new big data analytics clustera cross multiple Availability Zones. All nodes must have read/write access to shared file storage that is highly available, POSIX- compatible…

AWS Storage Gateway (File Gateway) provides NFS/SMB access to S3 but is typically used for hybrid cloud scenarios and is not designed as the native high-throughput, multi-AZ shared file system for cloud-native big data clusters.

Amazon EFS in General Purpose mode has lower throughput limits than Max I/O mode, making it less suitable for the high-throughput requirements of a big data analytics cluster.

Amazon EBS is block storage, not a shared file system, and while Multi-Attach allows shared access within a single AZ for specific use cases, it does not provide POSIX-compliant shared file system capabilities across multiple Availability Zones.

Amazon EFS offers a highly available, POSIX-compliant shared file system accessible across multiple AZs. Selecting Max I/O performance mode is ideal for high-throughput, latency-insensitive applications like big data analytics clusters.