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A case for TCP Vegas in high-performance computational grids

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2 Author(s)
Weigle, E. ; R&D in Adv. Network Technol., Los Alamos Nat. Lab., NM, USA ; Wu-chun Feng

Computational grids such as the Information Power Grid (Johnston et al., 1999), Particle Physics Data Grid , and Earth System Grid depend on TCP to provide reliable communication between nodes across a wide-area network (WAN). Of the available TCP implementations, TCP Reno and its variants are the most widely deployed; however, Reno's performance in computational grids is mediocre at best. Due to conflicting results in the evaluation of TCP implementations, we present a detailed simulation study that unifies the conflicting results and demonstrates the limitations of earlier work. We focus on the two most debated versions of TCP-Reno and Vegas. Using real traffic distributions, we show that Vegas performs well over modern high-performance links and better than Reno with the proper selection of the Vegas parameters α and β. Our results exhibit ways to significantly enhance the performance of distributed computational grids that rely on TCP

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High Performance Distributed Computing, 2001. Proceedings. 10th IEEE International Symposium on

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