HP ML150 HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 23

Time-of-day power capping Using the task scheduling capabilities in IPM, administrators can create time-of-day power capping implementations in which the power cap for a server or group of servers is lowered and raised in predetermined pattern, typically on a daily cycle. Lowering the power cap on a group of servers during times of the day when electricity rates are highest will lower operating costs by decreasing average power use by the servers and, indirectly, by decreasing required cooling. To construct a time-of-day power capping scenario, administrators must create individual scheduled tasks in Insight Power Manager. In the SIM interface, this scheduling capability is accessed using the Configure Insight Power Manager option under the top-level Configure menu. Scheduling a task consists of several steps, including defining the new power cap (Figure 13), and creating the schedule for applying the power cap (Figure 14). Figure 13. Setting a power cap as part of a scheduled task Figure 14. Defining the scheduled Insight Power Manager task in Systems Insight Manager Constructing a time-of-day power capping model actually requires creating at least two separate scheduled tasks in Insight Power Manager. The first step is to create a scheduled task to apply a given power cap at a given time of day. Figures 13 and 14 show a power cap that is applied at 2:00 PM every day. Completing the time-of-day power capping requires creating a second task to remove or raise the power cap. 23