Abstract
The GriddLeS (Grid Enabling Legacy Software) middleware is a novel software layer
that allows previously separate legacy applications to be coupled in a software
workflow over the grid without any changes to the application source code. We
have previously tested GriddLeS on a number of applications, including a small
atmos-pheric sciences workflow in which weather and climate models are coupled.
In this paper we describe a number of enhancements to the previous implementation
that im-prove its performance significantly. Specifically, the new implementation
improves the performance when small blocks are written over high latency networks.
The paper also describes a much larger atmospheric sciences workflow than previously
re-ported, that couples multiple global climate models, regional weather models
and pollution models in one virtual application.