基于带权有向图的网格工作流数据传输策略

针对网格中数据传输忽略网络状况的问题，提出了一种基于带权有向图的网格工作流数据传输策略．该策略针对不同数据处理率的网格工作流作业，首先根据网格内各结点之间的带宽，然后选择合适的数据传输方式，计算出两点之间的权重从而生成一个带权有向图．最后从图中选出最佳的传输路径进行数据传输，从而提高了工作流的执行性能．实验证明了在网络结构及传输速度一定时，该策略的数据传输性能优于传统的利用GridFTP直接传送的数据传输方法。

A strategy of data transferring of grid workflow based on weighted directed graph

Aiming at the neglect of network in data transferring, a strategy of data translerrlng ot grid workflow based on weighted directed graph was proposed. The strategy works for grid workflow on the basis of different data process rate. In accordance with the bandwidth between every two grid nodes, the suitable data transfer mode was chosen. The weight between the two nodes was calculated to build a weighted directed graph. The best transfer route from the graph was chosen to process the data transmission, improving the performance of the work flow. The experimental result showed that the data transmission performance of the strategy is better than the traditional one which directly transmits the data by GridFTP on condition that the network structure and transmission speed are to a certain extent.