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Resource Management by Tom Bialaski, Enrique Vargas, Evert Hoogendoorn, Adrian Cockcroft, Richard Mc Dougall

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WLM Control Architecture

Control within WLM is centered around the SRM(IBM) component which is responsible for:

  • Resource adjustment

  • Policy adjustment—this does not refer to the service policy but to the way resources are distributed and how this is adjusted and balanced. SRM(IBM) is capable of doing this because of the ability of WLM components to appropriately gather and assign metrics and then to control the requisite resources. When in goal mode it effectively controls the following resources:

    • Processor

    • Virtual memory system (MVS)

    • Disk I/O

Once a series of goals have been assigned, in the form of service class periods, WLM ensures that all of the appropriate measurements are taken during the process or transaction. Periodically, it compares observed ...

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