Power Manager supports two types of policies you can use to monitor the power and temperature of your data center devices.
Static policy
A static policy contains various settings that help regulate the power consumption of a specific device or a group. A power management policy is useful in different situations. For example, you can create a policy to:
Ensure that power consumption does not exceed the capacity of the circuit.
Schedule power usage according to the workload of the device or group For example, to reduce the overall power use in your data center, apply an aggressive power cap policy when the workload is low.
Increase rack density. For example, to increase the rack density or number of devices in a group you can set a power cap at a group level and add more servers. The policy cap keeps the power within the defined limit.
Temperature-triggered policy
A temperature-triggered policy is used to prevent damage to devices due to overheating in the event of cooling infrastructure failure. It limits the processing capability of the devices in the group, hence reducing the heat generation. The policy helps in maintaining the data center temperature to align to the standards defined by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). Create a temperature-triggered policy on a group of devices by defining a temperature threshold value. After defining the threshold value and enabling the policy, if the average inlet temperature of the group crosses the temperature threshold value, Power Manager enforces an EPR—Throttle on the group. On the EPR page, the source of EPR is displayed as Temperature-triggered—Throttle on the group.
NOTE Temperature-triggered policies are applicable only for groups, and only one temperature-triggered policy is supported for a group.
NOTE After applying a policy on a group, if you add more devices to the group and the power consumption exceeds the power cap, then you receive alerts in
Alert Log with the recommended action.
In multiple policies scenario, an active policy with a power cap value of 1000 Watts is applied on a device, and then another active policy with a power cap value of 1500 Watts is applied on the same device, the policy with power cap value of 1000 Watts is applied on the device as this policy is the most restrictive policy.
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