An evaluation of a user-level data transfer mechanism for high-performance networks.
Phillip M. Dickens, William Gropp · University of North Texas Digital Library (University of North Texas) · 2002
In this paper, we describe FOBS: a simple userlevel communication protocol designed to take advantage of the available bandwidth in a highbandwidth, high-delay network environment. We compare the performance of FOBS with that of TCP both with and without the so-called Large Window extensions designed to improve the performance of TCP in this type of network environment. We show that FOBS can obtain on the order of 90 % of the available bandwidth across both short- and long-haul highperformance network connections. For the longhaul connection, the bandwidth obtained was 1.8 times higher than that of the optimized TCP algorithm. Also, we demonstrate that the additional traffic placed on the network because of the greedy nature of the algorithm is quite reasonable, representing approximately 3 % of the total data transferred. 1.