HP ML310 HP Power Capping and Dynamic Power Capping for ProLiant servers techn
HP ML310 - ProLiant - G2 Manual
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- HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 1
and maximum power consumption for a server 6 Differences between HP Dynamic Power Capping and HP Power Capping 7 Power provisioning and Dynamic Power Capping 7 Support for Power Capping in ProLiant servers 8 Group power capping for servers through Insight Power Manager 8 Enclosure Dynamic - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 2
Using HP Power Regulator in conjunction with power capping 25 Power capping and CPU utilization 25 Summary ...26 For more information...26 Call to action ...26 - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 3
tasks. Both HP Power Capping and HP Dynamic Power Capping are implemented in system hardware and firmware and are therefore not dependent on the operating system or applications. Using the power monitoring and control mechanisms built into ProLiant servers, power capping is specifically designed to - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 4
Server Power Usage Base Load 13% Hard Drives 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 - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 5
power consumption. Depending on the processor model, the system BIOS can either reprogram the processor to run at a lower Power versus performance characteristics for a typical Intel-based ProLiant server with three P-states WWaatttss DL360 G4 Power vs. Work Done Clock Throttling slope P-state - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 6
(CPU, memory, disk drives and I/O) and even the mix of instructions being executed - have a dynamic effect on power consumption. As long as the total server power the five-minute average and the peak power readings for the server. iLO will raise the maximum power consumption level if it measures a - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 7
power and cooling provisioning Basic Power Capping iLO and system ROM BIOS Firmware control of Pstate/clock throttling through processor degrees C and 150 percent overload. This basic difference, the ability to keep server power consumption below the power cap in real time, means that Dynamic Power - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 8
Dynamic Power Capping is available on a limited set of ProLiant servers and a larger set of ProLiant c-Class server blades. Many ProLiant G5 servers are capable of supporting Dynamic Power Capping once the appropriate BIOS and iLO firmware have been fully qualified. Please consult the most recent - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 9
as those supporting basic Power Capping. For server blades, there is the new and more advanced Enclosure Dynamic Power Capping. Enclosure Dynamic Power Capping Enclosure Dynamic Power Capping is a special implementation of Dynamic Power Capping designed specifically for HP BladeSystem enclosures - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 10
The power cap lower bound is determined by adding up the total power that the server blades would use in their lowest P-state mode (typically about halfway between server idle and server maximum power), the maximum power that fans in the enclosure could draw, and the power-on power requests from the - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 11
all server blades that support basic Power Capping or the faster Dynamic Power Capping. It also provides circuit breaker protection using either of these types of server blades. To accomplish this, Enclosure Dynamic Power Capping relies on the extra circuit capacity of enclosures configured with - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 12
can also set power caps for groups of ProLiant ML and DL servers and for groups of enclosures. For individual enclosures, administrators can set power caps using the Onboard Administrator (OA) or IPM. Power caps are set in exactly the same manner on servers supporting Dynamic Power Capping as those - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 13
In Insight Power Manager, 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 using Insight Power Manager 13 - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 14
Insight Power Manger is the sole tool for setting power caps for groups ProLiant ML and DL servers. Using the IPM interface, an administrator can apply a power cap to the server group that is between the minimum power and the power supply rating of the entire group. This is illustrated in Figure - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 15
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 Onboard Administrator. This screen is where the Enclosure Dynamic Power Cap is set. Figure 8. Setting an Enclosure Dynamic Power Cap in - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 16
the same time. Figure 9 shows six BladeSystem c-Class Enclosures that have been configured as a group in IPM. The maximum available power for the group is method described earlier for applying a group power cap to ML and DL servers. The OA within each enclosure will use this power cap to determine - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 17
that can be used to select the most effective power caps 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 Quad-Core Intel Xeon X5460 3.16-GHz processors, one 72-GB - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 18
Figure 10. HP Power Calculator results for a configured ProLiant DL380 G5 server 18 - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 19
power measurements recorded over the same timeframe. Figure 11. Group Power Consumption graph for a group of eight ProLiant DL380 G5 servers The peak power consumption for the server group running this particular workload is about 3116 watts, and the average power consumption is about 1900 watts - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 20
for 8 DL380 G5 servers (based on HP Power Calculator) Maximum power consumption when capping to peak Power 3384 watts 3116 watts Savings in power capacity 268 watts Additional servers that can be provisioned within the same cooling infrastructure 0.7 If all eight servers supported Dynamic Power - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 21
consumption for 8 ProLiant DL580 G5 servers (based on HP Power Calculator) the cap, a group of servers supporting Dynamic Power Capping should only HP BladeSystem c7000 enclosure fully configured with 16 server blades. Provisioning the power to the total of the HP 2250W power supplies' specification - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 22
Power Capping 7836 Watts (PSU Specification) P ower P rovisioned to www7.hp.com/ERC/downloads/4AA2 failure in part of a data center. In this situation, administrators can manually lower the power cap on a group of servers using IPM and power capping. This will quickly and efficiently lower server - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 23
will lower operating costs by decreasing average power use by the servers and, indirectly, by decreasing required cooling. To construct a this scheduling capability is accessed using the Configure Insight Power Manager option under the top-level Configure menu. Scheduling a task consists of several - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 24
during start-up before Dynamic Power Capping is online when the servers determine their maximum power consumption and will draw close to their maximum power at roughly the same time. If this peak is too large, it may cause problems. To prevent this from occurring, it is important to manually power - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 25
server blades. Peak power reporting and Dynamic Power Capping Both iLO 2 and IPM report the power metrics for ProLiant servers, including peak power consumption. The power monitoring system for servers server (or group of servers) without impacting server performance. In its recommended configuration - HP ML310 | HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 26
/ipm 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/dynamicpower-capping/support.html http://h30099.www3.hp.com/configurator/powercalcs.asp www.hp.com/go/proliant-energy-efficient http
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