A Network Model for Simulation of Grid Application

Abstract

(eng) In this work we investigate network models that can be potentiallyemployed in the simulation of scheduling algorithms for distributedcomputing applications. We seek to develop a model of TCP communicationwhich is both high-level and realistic. Previous research works show thataccurate and global modeling of wide-area networks, such as the Internet,faces a number of challenging issues. However, some global models offairness and bandwidth-sharing exist, and can be link withthe behavior of TCP.Using both previous results and simulation (with NS), weattempt to understand the macroscopic behavior of TCPcommunications. We then propose a global model of the network for the Grid platform. We perform partial validation of this model in simulation.The model leads to an algorithm for computing bandwidth-sharing. Thisalgorithm can then be implemented as part of Grid application simulations.We provide such an implementation for the SimGrid simulationtoolkit.