Prototype Performance

System performance using prototype hardware

This experiment directly measures the improvements in the NFS software in a usable file system. The ATOMIC file server outperforms unmodified NFS across the entire range of file sizes from a few kilobytes to multi-megabyte files, which confirms our earlier results. The arrows indicate the reduction in throughput caused by using the disk.

Comparison with TCP file transfer

Both the ATOMIC file system and the TCP file transfer fully utilize the system. The network interface and the SAM-300 are both attached to the SBus, and provide approximately 85 Mb/sec. Because file data must traverse that bus twice, the approximately 45 MB/sec represents a full utilization of the bandwidth available to these peripherals. The ATOMIC file server consistently outperforms unmodified NFS.

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Last modified July 9, 1997