Enclosure Dynamic Power Capping; Elements Of An Enclosure Power Cap - HP Integrity NonStop NB54000c Introduction Manual

Figure 3. Apportioning a group power cap to individual servers in the group
Individual Servers
1000 watts (Power supply maximum)
400 watts
200 watts
500
200
125
1000
375
200
1000
400
200
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
(Maximum)
320 watts (Apportioned Cap)
(Minimum)
170
305
320
Servers as a Group
3500 watts
(Group power supply
maximum)
1375 watts
(Group maximum)
725 watts
(Group minimum)
1115 watts
(User set group power cap)
8