HP ProLiant DL280 HP Power Capping and HP Dynamic Power Capping for ProLiant s
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- HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 1
below the cap 5 Minimum and maximum power consumption for a server 5 Differences between HP Dynamic Power Capping and HP Power Capping 6 Power provisioning and Dynamic Power Capping 6 Support for Power Capping in ProLiant servers 7 Enclosure Dynamic Power Capping ...8 Elements of an enclosure - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 2
Providing a guardband for a power capping group 23 Summary ...24 For more information...25 Call to action ...25 - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 3
implements both Power Capping and HP Dynamic Power Capping in system hardware and firmware. Therefore, they are not dependent on the operating system or applications. Power capping uses the power monitoring and control mechanisms built into ProLiant servers. These mechanisms allow an administrator - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 4
4% PCI Slots 15% Processor 33% Memory 28% Fans 7% Processor P-states Processor performance states, or P-states, provide a quick and effective mechanism for adjusting processor power consumption and performance. Both Intel® and AMD® processors support using P-states to decrease processor power - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 5
empirically, the two power values implicitly take into account the server configuration and its current physical environment. The Insight Control and iLO interfaces display both values to provide key information that administrators can use to set effective power caps. The power management system in - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 6
HP BladeSystem servers. For a blade server, the maximum available power is the amount of power that the enclosure's Onboard Administrator reserved for that server blade. Both iLO and Insight Control report this value: iLO Basic Power Capping iLO and system ROM BIOS Firmware control of Pstate/ - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 7
Power Capping in ProLiant servers ProLiant servers with power measurement circuitry support basic Power Capping: • ProLiant G5 servers ML350, ML370, DL360, DL365, DL380, and DL385 • All c-Class BladeSystem servers Basic Power Capping requires the following system firmware: • iLO 2 version 1.30 or - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 8
the same way on ProLiant ML and DL servers with either Dynamic Power Capping or basic Power Capping. For server blades, there is a 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 • - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 9
power cap maintainable for the enclosure under all operating conditions: • Total power that the server blades would use in their lowest power-capped state (typically about halfway between server idle and server maximum power) • Maximum power that fans in the enclosure could draw • Power-on power - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 10
Control, you can also set power caps for groups of ProLiant ML and DL servers and for groups of enclosures. For individual enclosures, you can set power caps using the OA or Insight Control. You set power caps in exactly the same way on servers supporting Dynamic Power Capping or basic Power Capping - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 11
based interface (Figure 5), Power Capping Settings is located beneath the Power Management tab in the Settings subsection. The iLO 2 Power Management Settings screen indicates whether the server supports Dynamic Power Capping. Figure 5. Setting a power cap for an HP BladeSystem server using iLO 2 11 - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 12
In Insight Control, Power Capping is located beneath the HP Power Management Actions section of the interface, as shown in Figure 6. Figure 6. Setting a power cap for an HP BladeSystem server using Insight Control 12 - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 13
for groups of ProLiant ML and DL servers. Using the Insight use either the OA or Insight Control to set the power cap for a BladeSystem enclosure to any value between the power cap lower bound and the maximum available power for the enclosure. Figure 8 shows the Power Management screen from HP - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 14
Dynamic Power Cap in HP Onboard Administrator 2.60 Setting a power cap for a group of enclosures An administrator can use Insight Control to apply enclosure dynamic power caps to a group of enclosures at the same time. Figure 9 shows five BladeSystem c-Class Enclosures configured as a group in - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 15
Control and iLO provide historical power consumption data. You can use that data to refine the power cap selection to achieve specific power savings or capacity planning targets. Figure 10 shows the output from the HP Power Calculator utility for a ProLiant DL380 G5 server configured with two - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 16
could use when calculating the maximum power and cooling requirements to support this system in the data center. For a rack containing a group of eight of these servers, the total requirements would be 3384 watts. Figure 10. HP Power Calculator results for a configured ProLiant DL380 G5 server 16 - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 17
a group of eight ProLiant DL380 G5 servers The peak power consumption for the server group running this particular server group against 3116 watts of power consumed rather than against the larger maximum power number of 3384 watts that the HP Power Calculator Utility shows for this configuration - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 18
. So the effects of configuration and environmental changes are ignored. Table 4 shows a summary of the power consumption and capacity savings for the server group. Table 4. Power consumption for eight DL380 G5 servers when capping to peak power consumption using basic Power Capping Description - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 19
cooling infrastructure. Table 6. Power consumption for eight DL380 G5 servers when capping to average power consumption using basic Power Capping Description Power Maximum power consumption for 8 ProLiant DL580 G5 servers (based on HP Power Calculator) 3384 watts Maximum power consumption when - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 20
with Enclosure Dynamic Power Capping 7836 Watts (PSU Specification) P ower P rovis ioned to P S manually lower the power cap on a group of servers using Insight Control and power capping. This will quickly lower server performance. Using HP SIM, you can define and store groups of servers as - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 21
decreases the average power use by the servers and, indirectly, decreases required cooling. To construct a time-of-day power capping scenario, you must create scheduled tasks in Insight Control. In the SIM interface, you access this scheduling capability using the Configure, Power Management, Power - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 22
peak is too large, it may cause problems. Therefore, it is important to manually power on these server groups in a staggered manner. Administrators using the iLO interface or the enclosure OA for BladeSystem servers can stagger auto power-ups by enabling the servers' Power On Delay and setting it to - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 23
to see reported peak power numbers that are several watts above a server's power cap value. Dynamic Power Capping still provides circuit protection, since it will always bring server power consumption below the cap long before a circuit breaker can trip. Using HP Power Regulator in conjunction with - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 24
can approach zero as the number of servers increases. • Hardware and environmental changes can increase server power consumption and cause a servers. Summary HP Power Capping and HP Dynamic Power Capping are important power management features of HP ProLiant servers. System administrators can use - HP ProLiant DL280 | HP Power Capping and HP Dynamic Power Capping for ProLiant s - Page 25
.hp.com/go/insightcontrol http://www.hp.com/go/ilo http://www.hp.com/go/hpsim http://h71028.www7.hp.com/ERC/downloads/4AA2-3107ENW.pdf http://h18004.www1.hp.com/products/servers/management/dynamic-powercapping/support.html http://h30099.www3.hp.com/configurator/powercalcs.asp www.hp.com/go/proliant
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HP Power Capping and HP Dynamic Power Capping for
ProLiant servers
Technology brief, 2
nd
Edition
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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4
How power capping functions
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5
Maintaining power consumption below the cap
...................................................................................
5
Minimum and maximum power consumption for a server
......................................................................
5
Differences between HP Dynamic Power Capping and HP Power Capping
.................................................
6
Power provisioning and Dynamic Power Capping
................................................................................
6
Support for Power Capping in ProLiant servers
....................................................................................
7
Enclosure Dynamic Power Capping
.......................................................................................................
8
Elements of an enclosure power cap
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8
Operation of Enclosure Dynamic Power Capping
.................................................................................
9
Active power reallocation
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10
Enclosure Dynamic Power Capping in mixed blade environments
........................................................
10
Opting out servers
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10
Setting power caps for servers
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10
Setting a power cap for a single server
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11
Setting a power cap for a group of servers
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13
Setting a BladeSystem enclosure power cap
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13
Setting a power cap for a group of enclosures
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14
Using power capping in data center provisioning
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15
Choosing effective power caps
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15
Power capping to peak power consumption
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17
Power capping to average power consumption
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19
Using Enclosure Dynamic Power Capping in power provisioning
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19
Power capping for emergency management
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20
Time-of-day power capping
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21
Subtleties of power capping
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22
Avoiding power capping conflicts within groups
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22
Powering up groups of servers when using Dynamic Power Capping
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22
Setting low or unattainable power caps on servers
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22
Peak power reporting and Dynamic Power Capping
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23
Using HP Power Regulator in conjunction with power capping
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23
Power capping and CPU utilization
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23
Power capping and option cards
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23