HP ML350 Optimizing facility operation in high density data center environment - Page 8

Figure 3. Power consumption of ProLiant DL380 G4 server at different AC supply levels 625 622 620 615 610 605 600 601 600 599 599 599 595 Watts AC 590 585 100 115 200 208 220 230 240 Volts AC Therefore, a 1000-server datacenter would save approximately $25,000 per year3 in direct and indirect power costs by using 208V instead of 115V power. Power management and reporting of individual servers Power management and reporting of all servers are essential to managing power and cooling in a data center environment. HP provides the HP Power Regulator for ProLiant, HP Integrated Lights Out processors (iLO and iLO 2), and HP SIM to help manage power at a server level. Power Regulator is an OS-independent power management feature of complaint HP ProLiant servers.4 Power Regulator technology enables dynamic or static changes in CPU performance and power states. Power Regulator effectively executes automated policy-based power management at the individual server level. Power Regulator can be enabled on single systems from the system ROM, iLO browser, or command line. A more robust management capability is available by using HP SIM. HP SIM allows administrators to access the iLO management processors of multiple servers in a data center environment. The iLO and iLO 2 management processors monitor the CPU operation of individual servers at high and low performance levels and report the percentage of time at each level over 24 hours. This provides an indication of CPU power efficiency. Results are accessible from the iLO browser, command line, and scripted reports (see Figure 4 for an example when using a browser). When IT administrators use SIM, this historical information is available for multiple servers along with more extensive reporting options accessed through HP Insight Power Manager (IPM). IPM allows administrators to view server power usage over time as well as over the entire data center, as described in more detail in the section titled "Efficient practices for facility-level power and cooling". 3 Department of Energy: 8¢ per kWh US national average 4 Information about Power Regulator compliant ProLiant servers can be found at; http://h18013.www1.hp.com/products/servers/management/ilo/sup_servers.html?jumpid=reg_R1002_USEN 8