Datasheet

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CHAPTER 1 VMware VSphere 4 OVerView
di S t r i b u t e d Po w e r Ma n a g e M e n t
VMware DPM enables you to reduce energy consumption in the data center by optimizing the
placement of virtual machines within a cluster. When resource utilization in a DRS cluster goes
down, DPM consolidates virtual machines within the cluster on fewer ESX servers and powers
off unused servers to conserve energy. When resource requirements increase, DPM brings ESX
servers back online to ensure that virtual machines get appropriate resources and service levels
can be maintained (Figure 1.7).
DPM uses technologies such as IPMI, iLO, and Wake on LAN to control server power states.
ESX/ESXi 4.0 also supports the Enhanced Intel SpeedStep and Enhanced AMD PowerNow!
CPU power management technologies. These technologies leverage dynamic voltage and fre-
quency scaling (DVFS) to reduce power consumption.
Figure 1.6
VMware vSphere
DRS automation
levels
Figure 1.7
VMware vSphere
DPM power
management
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