Interoperable run-time tools for distributed systems - A case study

Tools that observe and manipulate the run-time behavior of parallel and dis tributed systems are essential for developing and maintaining these systems . Sometimes users would even need to use several tools at the same time in order to have a higher functionality at their disposal. Today, tools develo ped independently by different vendors are, however, not able to interopera te. Interoperability not only allows concurrent use of tools, but also can lead to an added value for the user. A debugger interoperating with a check pointing system, for example, can provide a debugging environment where the debugged program can be reset to any previous state, thus speeding up cycl ic debugging for long running programs. Using this example scenario, we derive requirements that should be met by t he tools' software infrastructure in order to enable interoperability. A re view of existing infrastructures shows that these requirements are only par tially met today. In an ongoing research effort, support for all of the req uirements is built into the OMIS compliant on-line monitoring system OCM.