Abstract
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3
Introduction
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3
Basics of server power control
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3
Processor P-states
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4
Clock throttling
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5
How power capping functions
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6
Maintaining power consumption below the cap
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6
Minimum and maximum power consumption for a server
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6
Differences between HP Dynamic Power Capping and HP Power Capping
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7
Power provisioning and Dynamic Power Capping
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7
Support for Power Capping in ProLiant servers
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8
Group power capping for servers through Insight Power Manager
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8
Enclosure Dynamic Power Capping
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9
Elements of an enclosure power cap
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9
Enclosure Dynamic Power Capping operation
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10
Active power reallocation
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11
Enclosure Dynamic Power Capping in mixed blade environments
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11
Opting out servers
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11
Setting power caps for servers
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12
Setting a power cap for a single server
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12
Setting a power cap for a group of servers
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14
Setting an BladeSystem enclosure power cap
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15
Setting a power cap for a group of enclosures
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16
Using power capping in data center provisioning
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17
Choosing effective power caps
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17
Power capping to peak power consumption
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19
Power capping to average power consumption
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21
Using Enclosure Dynamic Power Capping in power provisioning
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21
Additional uses for power capping
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22
Power capping for emergency management
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22
Time-of-day power capping
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23
Subtleties of power capping
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24
Avoiding power capping conflicts within groups
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24
Powering-up groups of servers when using Dynamic Power Capping
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24
Setting low or unattainable power caps on servers
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24
Peak power reporting and Dynamic Power Capping
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25
HP Power Capping and HP Dynamic Power
Capping for ProLiant servers
technology brief, 2
nd
edition