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Power management using spare capacity of redundant power supply in blade environment

  • US 7,457,976 B2
  • Filed: 11/22/2005
  • Issued: 11/25/2008
  • Est. Priority Date: 11/22/2005
  • Status: Expired due to Fees
First Claim
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1. A method for power management in a blade computing system having one or more power supplies and a plurality of components capable of being powered up by said one or more power supplies, comprising:

  • continuously monitoring power allocated for all fully-powered-up components;

    retrieving a maximum power value for a first component requesting full power-up, wherein the maximum power value for said first component is stored in BIOS of said first component;

    performing a partial power-up of said first component to execute the BIOS, thereby enabling the options present on said first component to be identified without performing a full power-up of said first component;

    identifying any over-subscription policies for said blade computing system;

    determining if the maximum power value for said first component falls within or outside of an over-subscription policy;

    accepting and fully powering-up said first component if the maximum power value for said first component falls within an over-subscription policy;

    rejecting and not fully powering-up said first component if the maximum power value for said first component falls outside of said over-subscription policy;

    sensing a loss of function in at least one of said power supplies; and

    upon sensing of a loss of function of at least one of said power supplies, performing a power-reduction procedure whereby one or more of said components are throttled to reduce the aggregate of power consumed by said plurality of components, whereby said throttling is performed according to a predetermined throttling schedule, and wherein said predetermined throttling schedule first throttles components drawing the highest amounts of power.

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