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Large-Scale Resource Allocation

Large-Scale Resource Allocation. Amin Vahdat Dec 8, 2002 http://issg.cs.duke.edu. Models for Resource Allocation. With analogy to network resource allocation Best effort slices compete with one another for resources Guaranteed slices pin down resources based on leases Key question:

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Large-Scale Resource Allocation

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  1. Large-Scale Resource Allocation Amin VahdatDec 8, 2002http://issg.cs.duke.edu

  2. Models for Resource Allocation • With analogy to network resource allocation • Best effort slices compete with one another for resources • Guaranteed slices pin down resources based on leases • Key question: • How to determine what level of “guaranteed resources” to allocate to each slice • What is the “pricing” model?

  3. Market-based Resource Allocation • Guarantee portion of global resources to PlanetLab sites • Resources are then allocated hierarchically • To join PlanetLab, each site must cede some portion of its resources to PlanetLab • PlanetLab in turn reallocates Berkeley’s resources among competing other Slices • Beyond guaranteed level, Slices must compete in the best effort pool • Taking advantage of statistical multiplexing to generally get more than their guaranteed share

  4. PlanetLab Resource Allocation • How to coordinate among multiple resource brokers? • What portion of resources allocated to PlanetLab? PlanetLab SiteManager SiteManager ResourceBroker ResourceBroker ResourceBroker SiteManager SiteManager

  5. PlanetLab Resource Allocation • Sites allocate some portion of resources to PlanetLab PlanetLab SiteManager SiteManager ResourceBroker ResourceBroker ResourceBroker SiteManager SiteManager

  6. PlanetLab Resource Allocation • In exchange, PlanetLab allocates some portion of global resources to individual sites (signed statements w/lease) PlanetLab SiteManager SiteManager ResourceBroker ResourceBroker ResourcePrivileges ResourcePrivileges ResourceBroker SiteManager SiteManager

  7. PlanetLab Resource Allocation • A site can delegate its resource privileges to a service • The service manager interacts with the resource broker to obtain tickets PlanetLab SiteManager SiteManager ResourceBroker ResourceBroker ResourceBroker SiteManager SiteManager ServiceManager

  8. Resource Allocation Questions • Brokers may trade privileges w/one another to temporarily acquire extra resources for services • Enabling popular services to receive more resource privileges • Require transfer of resource rights from requesting clients • Service executes in “context of” privileges of requesting client • Policy for allocating resources to sites/principals • Proportional to resources allocated to PL? • Bonus rights for allocating resources that system needs most? • E.g., PL needs bandwidth in a particular region of the network • Coordinating resource allocation among resource brokers? • Separate policy from mechanism • Develop general mechanisms to support range of policies

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