Ian Price writes "Red Hat is shrugging off Microsoft's entry into the cluster computing space after Microsoft announced that it has completed the code for its Windows Compute Cluster Server 2003 targeting high-performance computing. From the article: 'Scott Crenshaw, general manager of enterprise Linux platform at Red Hat, dismissed Microsoft's entry into cluster computing. "They're playing catch-up," he said. "Linux is often associated with high-performance computing, but Windows has never achieved that on a large scale."' Crenshaw also commented with respect to Ubuntu: 'Their user base is still small, so we're not seeing the impact of it [Ubuntu] so far.'"