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SEDA - Architecture for Highly-Concurrent Server Applications - The Diigo Meta page

www.eecs.harvard.edu/...seda - Cached - Annotated View

Joel Liu's personal annotations on this page

joel

  • SEDA is an acronym for staged event-driven architecture, and
    decomposes a complex, event-driven application into a set of
    stages connected by queues. This design
    avoids the high overhead associated with thread-based concurrency
    models, and decouples event and thread scheduling from application
    logic. By performing admission control on each
    event queue, the service can be well-conditioned to load, preventing
    resources from being overcommitted when demand exceeds service
    capacity.
    SEDA employs dynamic control to automatically tune runtime parameters
    (such as the scheduling parameters of each stage), as well as to
    manage load, for example, by performing adaptive load shedding.
    Decomposing services into a set of stages also enables modularity and
    code reuse, as well as the development of debugging tools for complex
    event-driven applications.

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