The data retrieval is handled by the StruxureWare Data Center: IT Power Control module and supported through a variety of protocols, such as IPMI or SSH. For further information about Intel(R) Data Center Management, see the documentation provided by Intel.
StruxureWare Data Center: IT Power Control is an add-on module to StruxureWare Data Center: IT Optimize and you must have a valid StruxureWare Data Center: IT Optimize license to use it.
You can configure the StruxureWare Data Center: IT Power Control server communication in System Setup>External System Configuration.
When the server communication and device discovery has been configured, the device data, including power and temperature data appears in the list of discovered devices in Planning>Device Association.
To open the Discovered Devices pane, select Window>Show View>Discovered Devices.
If the relevant columns do not show in the table for the discovered devices, click this icon above the pane and select to show the power and temperature columns.
Servers appear in the list of Server Discoveries.
It is also possible to see Historical power data for devices discovered with the IT Power Control module. Those can be found in power properties of the device that has been associated with a IT Power Control discovered device.
Power capping allows you to limit how much power your IT equipment can use and helps you free UPS capacity.
The manufacturer's nameplate and adjusted nameplate values for servers are higher than the actual measured power consumption. Power capping allows you to use some of this stranded capacity without tripping the breakers.
When you cap the power consumption of a server or a group of servers, you set a fixed limit that the server will not exceed, regardless of its current workload. The cap has no effect until the server reaches its power consumption limit. At that point, a management processor adjusts CPU performance states and clock throttling to limit the power consumption and prevent the breakers from tripping.
You can configure different levels of power capping depending on how much capacity you want to free and how critical the servers are to the operation of your data center.
For example, you can set the power cap low for servers running non-time critical operations. You will free a lot of capacity but the servers will run slower.
IT Power Control is installed with IT Optimize and you must have licenses for both to enable power capping in StruxureWare Data Center Operation.
Configuring power capping
It is not recommended to set the power capping value too low as it will affect performance and possibly prevent applications from running on the capped servers.
Use the selected strategy preview, showing the effect and performance impact before you apply power capping.
- Right-click on a rack and select Configure Power Capping.
- Choose between the power capping strategies or enter a custom cap value.
Click the info icons next to the options for information about the way the system calculates the cap values.
See the power capping effects and graphics to preview the selected cap level before applying it.
Typically, these options are sufficient. However, there is also an advanced configuration section in which you can select to enable or disable capping on specific servers and set the criticality level.
You can disable capping on mission critical servers altogether to avoid performance impact (clear the Cap check box) and define which servers will be affected first by the cap limit. Servers with low criticality will be affected first, critical servers last.
When you have configured power capping, a green P icon in the rack layout indicates that the rack or server is managed by a power capping strategy.