Energy efficiency is not enough, energy proportionality is needed!

  • Authors:
  • Theo Härder;Volker Hudlet;Yi Ou;Daniel Schall

  • Affiliations:
  • Databases and Information Systems Group, University of Kaiserslautern, Germany;Databases and Information Systems Group, University of Kaiserslautern, Germany;Databases and Information Systems Group, University of Kaiserslautern, Germany;Databases and Information Systems Group, University of Kaiserslautern, Germany

  • Venue:
  • DASFAA'11 Proceedings of the 16th international conference on Database systems for advanced applications
  • Year:
  • 2011

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Abstract

Due to the energy consumption/resource utilization characteristics of todays centralized DB servers, the fastest configuration is also the most energy-efficient one. Extensive use of SSDs alone cannot enable a fundamental change of this overall picture, because the storagerelated energy consumption is typically only a little fraction of the overall energy budget. Even, when this storage-related share is (almost) completely reduced by optimized flash-aware buffer management, the saving effect achieved may be limited by less than ∼10%. Therefore, we have designed a cluster of wimpy computing nodes called WattDB, where the individual nodes are dynamically attached and detached to the cluster on demand - depending on the current workload needs -, thereby aiming at energy-proportional DB management.