HP ProLiant DL170e HP Power Capping and Dynamic Power Capping for ProLiant ser
HP ProLiant DL170e - G6 Server Manual
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- HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 5
below that point requires the use of clock throttling. Figure 2. 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 slope 400 350 300 250 P0 200 P1 P2 150 100 50 - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 6
, such as the number of options installed in the server, have a predictable and static effect on server power consumption. Other factors -- including the temperature in the data center, the activity of the subsystems (CPU, memory, disk drives and I/O) and even the mix of instructions being executed - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 7
server's power cap much more rapidly than HP Power Capping. Table 3 provides a quick architectural and operational comparison of HP Dynamic Power Capping and HP Power Capping. To avoid confusion between the two, HP provisioning Basic Power Capping iLO and system ROM BIOS Firmware control of Pstate/ - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 8
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 support matrix: http://h18004.www1.hp.com/products - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 9
maximum) 1115 watts (User set group power cap) 1000 400 320 200 725 watts (Group minimum) For ProLiant ML and DL servers, group power capping apportionment works exactly the same on servers supporting Dynamic Power Capping as those supporting basic Power Capping. For server blades, there is the - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 10
the enclosure. 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 - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 11
server blades, Enclosure Dynamic Power Capping disables external changes to the individual server blade power caps using either iLO server blades. Enclosure Dynamic Power Capping in mixed blade environments Enclosure Dynamic Power Capping is designed to operate with all server blades that support - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 12
Power Capping. Servers supporting Dynamic Power Capping simply enforce the cap using the faster power management architecture. Setting a power cap for a single server Administrators can set a power cap for an individual server or server blade through iLO 2 or through IPM. In the iLO 2 browser-based - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 16
OA within each enclosure will use this power cap to determine a blade power budget for the enclosure and to create power caps for the individual server blades. It will then continue to monitor and adjust the individual server blade power caps based on their power demands. Figure 9. Setting a power - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 17
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 disk drive, and 8 GB of system memory. The results - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 18
Figure 10. HP Power Calculator results for a configured ProLiant DL380 G5 server 18 - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 19
graph for a group of eight ProLiant DL380 G5 servers The peak power consumption for the server group running this particular workload is about server group could then be safely budgeted against 3116 watts of power consumed rather than against the larger maximum power number of 3384 watts that the HP - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 20
. This will have an adverse affect on the performance of those servers, especially if they support Dynamic Power Capping, since its faster monitoring will have greater impact on limiting transient peaks. HP recommends that administrators using Dynamic Power Capping review the peak power consumption - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 22
Dynamic Power Capping 7836 Watts (PSU Specification) P ower P rovisioned to P • ≈4KW enclosure • 32 Blades per 8KW 0 Watts Using Dynamic http://h71028.www7.hp.com/ERC/ manually lower the power cap on a group of servers using IPM and power capping. This will quickly and efficiently lower server - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 23
during times of the day when electricity rates are highest will lower operating costs by decreasing average power use by the servers and, indirectly, by decreasing required cooling. To construct a time-of-day power capping scenario, administrators must create individual scheduled tasks in Insight - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 24
, if the iLO interface is used to set a power cap on an individual server, it will replace the previous power cap for that server, even if it is too large, it may cause problems. To prevent this from occurring, it is important to manually power on these server groups in a staggered manner. In - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - 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 utilization numbers reported by monitoring tools at the operating system level. If a server under - HP ProLiant DL170e | HP Power Capping and Dynamic Power Capping for ProLiant ser - Page 26
individual server blades based on 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
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