Term	Description
PDU	Power distribution unit: A device that distributes power to a data center.
IPDU	Intelligent PDU: PDU that is capable of energy metering at the outlet ports
UPS	Uninterruptible power supply: A device that provides immediate emergency power, usually by means of batteries, if power fails.
CRAC	Computer room air conditioner: Monitors and controls a computer room’s temperature, humidity, and air flow.
Chiller	Provides chilled water used to cool and dehumidify air.
Power saver mode	Provides a way to save power by dropping the voltage and frequency a fixed percentage. This percentage is predetermined to be within a safe operating limit and is not user configurable. Under current implementation this percentage is a 14% frequency drop. Power saver mode is available on POWER6® Blades and 9406/9117-MMA rack systems.
Power capping	Enforces a user-specified limit on power usage. Setting a power capping value ensures that system power consumption stays at or below the value that is defined by the setting. Power capping is available only on supported IBM Servers and IBM Blade Servers.
Carbon footprint	The footprint is the total set of greenhouse gases (GHG) emissions caused by an organization, event or product. For simplicity of reporting, it is often expressed in terms of the amount of carbon dioxide (CO2). For our scenarios, carbon footprint is used in the context of the data center: the total emission of CO2 of the data center is expressed in kg CO2.
DCiE	Data Center infrastructure Efficiency: is a performance metric for calculating the energy efficiency of a data center. DCIE is the percentage value derived, by dividing information technology equipment power by total facility power. For example, if a data center has a total power consumption of 8000kW, and 6000kW is being used for all IT equipment, the DCIE equals 75%.
PUE	Power Usage Effectiveness: Inverse of DCIE. PUE is the percentage value derived by dividing total facility power by IT facility power.
kWh	kilo watt hour: The amount of energy delivered in one hour at a power level of 1000W (measurement unit for selling electricity).

Note: The Tivoli Monitoring for Energy Management provides monitoring of a wide range of IT and facilities devices. If your data center hosts devices that are not supported by any of these agents, you can use the IBM Tivoli Agent Builder to design and package a custom agent to track and monitor power and thermal data. Creating a custom agent and integrating it with Tivoli Monitoring for Energy Management is described in IBM Tivoli Monitoring for Energy Management Reporting and Optimization User’s Guide, SC27-2418.

Note: We assume that you have installed the Active Energy Manager on the IBM Systems Director server. This needs to be installed before the AEM agent plug-in can be installed.

Important: When installing the Tivoli Monitoring for Energy Management AEM plug-in version 6.2.1 with IBM Systems Directory 6.2, the plug-in does not work correctly. Although the installation of the plug-in is successful, the agent status workspace in the Tivoli Enterprise Portal shows an error for the object status. The MANIFEST.MF file included with the AEM plug-in is not compatible with IBM Systems Director 6.2. For more information see the Technote: http://www.ibm.com/support/docview.wss?uid=swg21432288

Note: E9 is the product code for the IBM Tivoli Monitoring for Active Energy Management Agent.

Note: Figure 3-10 on page 33 shows warehouse interval of one day. Set it to 1 hour if you want hourly Reporting and Optimization reports.

Note: You might receive error messages indicating that you are not monitoring certain resources, for example PDUs. In that case, the table does not exist Tivoli Data Warehouse, and a red indicator is shown. The remaining collections work.

Tip: Another typical scenario in Tivoli Monitoring for Energy Management environment is the ability to set a threshold and be alerted of it being exceeded.