Damn United

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Damn United!
Barça 2 0 Damn Utd.
2
Power Is Energy Efficiency Just About
Performance? Do We Every Want to Turn Machines
Off?

• Andrea Baldini, Cisco
• Luiz Barroso, Google
• Stan Chesnutt, Google
• Trishul Chilimbi, Microsoft

• Brighten Godfrey, UIUC
• Randy Katz, UCB
• Milan Milenkovic, Intel
• Zhangxi Tan, UCB
• Arsalan Tavakoli, UCB

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• Economic case for energy reduction beyond
  processors
• Needed Better energy benchmarks with relevant
  workloadsit isnt about power consumed at peak
  performance
• SpecPower not that bad, just ignore the peak
  performance case
• Tradeoffs between quality of result and energy
  consumed
• Memory, IO, support chip sets not power
  proportional
• Needed Better understanding of the reliability
  effects of power cycling nodesmuch folklore,
  little facts
• Needed Understand how to reduce the latency of
  restarting a service, much more than simply
  restarting the node
• Implications for memory-intensive applications?
• Energy implications for replication?
• Management complexity trumps reliability
  considerations
• Idea explore active low power states in addition
  to deep sleep and full off
• Idea pools of nodes in different states of
  readiness, ready to reestablish service as need
  is discovered