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  • PhD Thesis Defense - Georgios Papadimitriou

    Wed, Oct 25, 2023 @ 11:00 AM - 01:00 PM

    Thomas Lord Department of Computer Science

    University Calendar

    PhD Thesis Defense - Georgios Papadimitriou

    Committee Members: Ewa Deelman (chair), Viktor Prasanna, Aiichiro Nakano

    Title: Cyberinfrastructure Management For Dynamic Data Driven Applications

    Abstract: Computational science today depends on complex, data intensive applications operating on datasets from a variety of scientific instruments. These datasets may be huge in volume, may have high velocity or both, raising a major challenge of how scientists can analyze these datasets. On the other hand, workflows processing these datasets might need to respond to changes in the processing load e.g, increases in data flow, in order to maintain a steady and predictable turnaround time.
    In this thesis we present our efforts to improve the performance of these data intensive application systems. We develop new tools that extend the functionality offered by the CI, and we provide a methodology to capture end to end performance statistics of the data intensive workflows. Additionally, we evaluate how the choices during the acquisition and configuration of resources affect the performance of the data intensive workflows. Finally, we answer the fundamental question of how scientists can manage the CI and apply policies that can help their applications meet their constraints .e.g, turn around time, by avoiding network degradation. We develop methodologies that take place during the planning phase of the workflows, and can reduce their peak network requirements. We also develop active approaches that can be applied and reduce the per workflow network requirements during their execution, using a workflow ensemble manager and application aware software defined flows.

    Location: Henry Salvatori Computer Science Center (SAL) - 213

    Audiences: Everyone Is Invited

    Contact: Melissa Ochoa


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