HP Insight Control Power Management 6.3 User Guide

new data center expansion can save your company thousands of dollars. Insight Control power management
provides you the following advantages:
• Knowledge to optimize power confidently
Reclaim trapped power and cooling capacity•
• Extend the life of the data center
• Control to safely achieve
More complete utilization of existing power/cooling infrastructure•
• Higher uptime for mission critical applications
Avoiding power provisioning errors
For scenarios like unintentionally adding more systems and devices than the limit in a data center, or power
redundancy errors for unavailability of redundant power, any increase in power demand may lead to tripped
breakers and unexpected downtime. For such scenarios, Insight Control power management helps you to
determine the actual power required for the IT equipments and provision the required power to meet the
need without using the excess capacity to protect the power supply infrastructure.
Power Capping
Power Capping and Dynamic Power Capping
HP Power Capping and HP Dynamic Power Capping — the power management features of HP ProLiant
servers, are implemented in system hardware and firmware and are independent of operating systems or
applications. Using the power monitoring and control mechanisms built into ProLiant servers, the Power
Capping feature is specifically designed to allow an administrator to limit, or cap, the power consumption
of a server or a group of servers. This capability provides increased flexibility in data center planning by
allowing the administrator to manage data center parameters that are directly influenced by server power
consumption, including data center cooling requirements and electrical provisioning. The Power Capping
feature also allows the administrator to control server power consumption in emergency situations such as
the loss of primary AC power.
Both HP Dynamic Power Capping and HP Power Capping are designed to achieve the same general goal
of maintaining the power consumption of a server at the same level or at a lower level of a specified value,
referred to as the cap value. However, HP Dynamic Power Capping monitors the power consumption and
maintains the power cap of a server much more faster than HP Power Capping.
Enclosure Dynamic Power Capping
Enclosure Dynamic Power Capping is an enhancement of Dynamic Power Capping designed specifically
for HP BladeSystem enclosures. Enclosure Dynamic Power Capping is considered as the higher level of
power management functionality since an administrator sets and maintains a power cap at the enclosure
level and not directly at the server or blade level. Also, it can be viewed as a more powerful enhancement
of group power capping for an enclosure, since setting a power cap for the enclosure indirectly creates
power caps for the server blades within it.
For more information on power capping, see www.hp.com/go/dpc.
Powering-up groups of servers
HP Dynamic Power Capping is a powerful tool for controlling the steady-state power consumption of servers
in real time. However, it does not control the power consumption of servers at start-up. If a group of servers
on the same PDU are powered up simultaneously, for example by using a Data Center Power Control rule,
there will be a window 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 power on
these server groups in a staggered manner. In the case of auto power-up situations, including during the
execution of Data Center Power Control rules, this staggered power-up can be achieved by enabling the
servers’ Power On Delay and setting it to "Random up to 120 seconds". This is accomplished through the
iLO interface or through the enclosure OA for BladeSystem servers.
Power Capping 17