Dynamically forecasting network performance to support dynamic scheduling using the network weather service

The Network Weather Service is a generalizable and extensible facility designed to provide dynamic resource per-formance forecasts in metacomputing environments. In this paper, we outline its design and detail the predictive perfor-mance of the forecasts it generates. While the forecasting methods are general, we focus on their ability to predict the TCP/IP end-to-end throughput and latency that is at-tainable by an application using systems located at different sites. Such network forecasts are needed both to support scheduling [5], and by the metacomputing software infras-tructure to develop quality-of-service guarantees [10, 17]