Experimental Evaluation of pNFS Protocol Using Network Direct Attached Hard Disk Drives for Mass Storage System
Experiments were performed to investigate the storage I/O performance of pNFS file system protocol using network direct attached hard disk drives as its storage subsystem. Comparison experiments were done to NFS4.0 and NFS4.1 with pNFS in order to further investigate the scalability of the two network file systems. It is found that NFS4.1 preserves the scalability as storage capacity is increased while NFS4.0 loses its scalability rapidly as its storage capacity is increased. It is also found that NFS4.1 shows, on average, over 4 times higher I/O speed than NFS4.0 when both systems uses the same set of network direct attached hard disk drives in their experiments.