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Your organization is implementing a new high-performance computing (HPC) cluster to support advanced scientific simul-ations. The cluster will consist of several hundred nodes that require rapid access to shared datasets. The storage is Vast/GL4F. The application is very sensitive to latency and minimizing CPU overhead during data transfers is critical to achieving the desired performance levels. Which access protocol should the organization implement to enhance NFS performance by reducing storage latency and increasing I/O operations?
Correct Answer: B
Detailed Explanation: Rationale for Correct Answer: For HPC and AI/ML workloads, NFS over RDMA (Remote Direct Memory Access) provides significantly lower latency and reduced CPU overhead compared to standard NFS over TCP. This allows direct memory-to- memory data transfers between storage and compute nodes, bypassing the kernel network stack. In VAST Data (underpinning GreenLake for File Storage), NFS over RDMA is explicitly supported to accelerate shared dataset access in HPC and AI environments. Distractors: A: Standard NFS introduces more latency due to kernel TCP/IP stack overhead. C: RoCE (RDMA over Converged Ethernet) is a transport layer technology - useful, but the protocol chosen for the file system must be NFS over RDMA, not just RoCE. D: iSER (iSCSI Extensions for RDMA) enhances iSCSI block storage, not NFS file workloads. Key Concept: NFS over RDMA for HPC/AI shared datasets. Reference: HPE GreenLake for File Storage powered by VAST - HPC Deployment Guide, RDMA and NFS performance white papers.
