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No Knobs

No Knobs. Dave DeWitt and Dieter Gawlick. A List of Issues. Auto Tuning Trade-off decisions Selection of functionality Discovery. Auto Tuning. Dynamic allocation of existing resources CPUs (blades), CPU cycles, processes, memory, storage, bandwidth, …

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No Knobs

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  1. No Knobs Dave DeWitt and Dieter Gawlick Lowell 2003

  2. A List of Issues • Auto Tuning • Trade-off decisions • Selection of functionality • Discovery Lowell 2003

  3. Auto Tuning • Dynamic allocation of existing resources • CPUs (blades), CPU cycles, processes, memory, storage, bandwidth, … • Index management, materialized view, query optimization, query re-write, … • Integrated with failure reaction (Disposable disks (RAID), disposable computers (blades)) • Low variance in response time • Advisors for need/impact of new resources Lowell 2003

  4. Auto Tuning • Single/multiple database(s)/database instance(s) • Two computer centers • Few blade computers in each • This is mostly engineering work • Keep knobs • Make use optional, maybe set by/through applications • Prepare code • Monitor, adjust • All database vendors are working hard on it Lowell 2003

  5. Auto Tuning • Research questions? • What to do with a bad query/program? • Reports are not the solution • 80% case: • How do we know that we are at 80%? • Maybe we are at 1/10% of optimum Lowell 2003

  6. Trade-off Decisions • Which application/task/user is most important? • To be defined on high level • Rules and regulation • Generic applications should set this should set this • Business value of application • Business transactions or part thereof • Generic • Content dependent • Organization • People (static resources) Lowell 2003

  7. Trade-off Decision • To be used as input for auto tuning • A model for high level abstractions would be helpful - Research issue? Lowell 2003

  8. Selection of Functionality • Feature Enabling • Option • Customization, preferences • Sources • Rules and regulations • Domain, enterprise, department, people • (Security) • Should be closely tied to model for trade-off decisions Lowell 2003

  9. Discovery • Low level discovery process • New/broken disks, blades, … • Depending on naming conventions and standards • Mostly a systematic engineering effort • High level discovery process • Semantic transformation , … Lowell 2003

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