User's Manual

Power Management 327
Server Power Reduction to Maintain Power Budget
CMC reduces power allocations of lower priority servers when
additional power is needed to maintain the system power consumption
within the user-configured System Input Power Cap. For example,
when a new server is engaged, CMC may decrease power to low
priority servers to allow more power for the new server. If the amount of
power is still insufficient after reducing power allocations of the lower priority
servers, CMC lowers the performance of servers until sufficient power is freed
to power the new server.
CMC reduces server power allocation in two cases:
• Overall power consumption exceeds the configurable System Input Power
Cap
(see "Setting the Power Budget" on page 325.)
• A power failure occurs in a non-redundant configuration.
For information about assigning priority levels to servers, see "Executing
Power Control Operations on the Chassis" on page 327.
Executing Power Control Operations on the Chassis
NOTE: To perform power management actions, you must have Chassis Control
Administrator privilege.
NOTE: Power control operations affect the entire chassis. For power control
operations on an IOM, see "Executing Power Control Operations on an IOM" on
page 329. For power control operations on servers, see "Executing Power Control
Operations on a Server" on page 330.
CMC enables you to remotely perform several power management actions,
such as an orderly shutdown, on the entire chassis (chassis, servers, IOMs,
iKVM, and PSUs).
Using the Web Interface
1 Log in to the CMC Web interface.
2 Select Chassis Overview in the system tree.
3 Click the Power tab.
The
Power Consumption Status page displays.
4 Click the Control subtab.
The
Chassis Power Control page displays.