VMware vSphere Distributed Resource Scheduler (DRS) is a series of algorithms devised to manage an aggregated pool of computing resources and distribute virtual machines among the ESXi hosts in a cluster in an effort to reduce any resource imbalance in the cluster. DRS can only be enabled on an ESXi host cluster via vCenter Server. Balancing the computing resources will ensure that a virtual machine (VM) gets the resources it needs, thereby increasing the service levels.

DRS monitors resource utilization on the ESXi hosts, does an intelligent allocation of resources, balances the computing capacity, and also helps in reducing the power consumption in the data center using DRS's power management feature known as Distributed Power Management (DPM). VMware DPM can help reduce the energy consumption of a data center by vacating VMs from an underutilized host and leaving that host in a power-off state.

Apart from a few advanced options, there is no real functionality change in vSphere...