HP Power Capping and HP Dynamic Power Capping for ProLiant servers

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Figure 3. Apportioning a group power cap to individual servers in the group
Group power capping apportionment works exactly the same way on ProLiant ML and DL servers with either
Dynamic Power Capping or basic Power Capping. For server blades, there is a more advanced feature called
Enclosure Dynamic Power Capping.
Enclosure Dynamic Power Capping
Enclosure Dynamic Power Capping is a special implementation of Dynamic Power Capping for HP BladeSystem
enclosures. In one sense, it is a higher level of power management functionality, since an administrator sets and
maintains a power cap at the enclosure level rather than directly at the server or blade level. In another sense, it is a
more powerful implementation of group power capping for an enclosure: Setting a power cap for the enclosure
indirectly creates power caps for the server blades within it. The Onboard Administrator (OA) then actively
manages these power caps and reallocates power as workloads change over time.
Elements of an enclosure power cap
With Enclosure Dynamic Power Capping, an administrator sets a power cap for an entire BladeSystem enclosure,
not simply for the server blades in the enclosure. Total power consumption for an enclosure is the sum of the power
used by all of these components:
• Server blades
• I/O peripherals for the enclosure (interconnects, etc.)
• Cooling fans for the enclosure
• Onboard Administrator(s)
Group Power Capping
Individual Servers
400 watts (Maximum)
200 watts (Minimum)
Servers as a Group
320 watts (Apportioned Cap)
200
125
170
375
200
400
200
305
320
1375 watts
(Group maximum)
725 watts
(Group minimum)
1115 watts
(User set group power cap)
1000 watts (Power supply maximum)
1000
1000
500
3500 watts
(Group power supply
maximum)