URSA MAJOR is a Web-based tool that facilitates the gathering of information about program characteristics and their execution behavior on high-performance machines. It supports users who want to learn about programs and programming methodologies as well as users who want to study in detail computational applications and their performance aspects. We present early experiences with URSA MAJOR and our vision of how the new internet technology and its combination with high-performance computing systems can be put to maximal use.
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