Power capping based on generator capacity
First Claim
1. A method of managing power load in a data center, the method comprising:
- determining that a utility power source for said data center has failed;
changing said data center to receive power from an Uninterruptable Power Supply (UPS) instead of from said utility power source;
while said data center is operating on said Uninterruptable Power Supply (UPS), using a power management policy to throttle servers in said data center to a power level below a collective capacity of a plurality of backup generators at said data center, said collective capacity being less than a maximum amount of power drawn by equipment in said data center;
after said servers have been throttled, changing power for said data center from said Uninterruptable Power Supply (UPS) to said generators;
causing said collective capacity of said generators to be less than an amount of power that is drawn by said data center under said data center'"'"'s maximum load by taking a generator at said data center out of service;
after said changing of power for said data center to said generators, determining that said utility power source is available;
changing said data center back to said utility power source from said generators; and
ceasing to throttle said servers.
2 Assignments
0 Petitions
Accused Products
Abstract
A data center may use generators for backup power, where the backup generators are able to serve less than the maximal power load of the data center. The use of generators that can serve less than the maximal power load may be recognized by, and addressed by, the power policy for the data center. When utility power is lost, the power policy manager may detect that the data center is switching to generator power, and may have knowledge of the capacity of those generators. If the capacity is less than the maximal power load of the data center, the power policy manager may shed load by throttling equipment in the data center to lower power levels. The policy may specify which pieces of equipment are to be throttled. When utility power is restored, the throttling of the equipment may be removed by the power policy manager.
40 Citations
20 Claims
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1. A method of managing power load in a data center, the method comprising:
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determining that a utility power source for said data center has failed; changing said data center to receive power from an Uninterruptable Power Supply (UPS) instead of from said utility power source; while said data center is operating on said Uninterruptable Power Supply (UPS), using a power management policy to throttle servers in said data center to a power level below a collective capacity of a plurality of backup generators at said data center, said collective capacity being less than a maximum amount of power drawn by equipment in said data center; after said servers have been throttled, changing power for said data center from said Uninterruptable Power Supply (UPS) to said generators; causing said collective capacity of said generators to be less than an amount of power that is drawn by said data center under said data center'"'"'s maximum load by taking a generator at said data center out of service; after said changing of power for said data center to said generators, determining that said utility power source is available; changing said data center back to said utility power source from said generators; and ceasing to throttle said servers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A data center comprising:
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a plurality of servers; a connection to a utility power source; and a power policy manager that runs on a computer in said data center, that determines that said utility power source is not providing power to said data center, that determines that a plurality of generators have been started in said data center, that determines that a collective capacity of said generators is less than an amount of power that would be drawn by said data center under said data center'"'"'s maximum load, that throttles said servers to reduce load of said servers at or below said collective capacity, that switches power for said data center to power provided by said generators, and that uses sensors to determine that said utility power source has ceased to provide power to said data center and to determine said collective capacity of said generators at a time that said utility power source fails; there being a power policy that is implemented by said power policy manager, said power policy specifying that said servers are to be throttled when said data center is powered by said generators. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of managing power load in a data center, the method comprising:
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determining that a utility power source for said data center has failed; changing said data center to receive power from an Uninterruptable Power Supply (UPS) instead of from said utility power source; while said data center is operating on said Uninterruptable Power Supply (UPS), using a power management policy to throttle servers in said data center to a power level below a collective capacity of a plurality of backup generators at said data center, said collective capacity being less than a maximum amount of power drawn by equipment in said data center; after said servers have been throttled, changing power for said data center from said Uninterruptable Power Supply (UPS) to said generators; after said changing of power for said data center to said generators, determining that said utility power source is available; changing said data center back to said utility power source from said generators; and ceasing to throttle said servers, said method being performed by a power policy manager that uses sensors to determine that said utility power source has failed and to determine said collective capacity of said generators at a time that said utility power source fails. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification