As part of our new and enhanced DRS, a new VM initial placement feature was enabled in vSphere 6.5. In earlier versions, DRS took a snapshot of the cluster state to come up with a host recommendation for VM initial placement. In vSphere 6.5, the new algorithm completely avoids snapshotting, so generating recommendations for placement is much faster and the recommendations are also more accurate. VM placement in DRS has the following highlights.
In vSphere 6.5, the new VM placement was available in limited configurations. For example, it was not available for:
In vSphere 6.7, the new placement has been made available for all configurations.
More information about the new VM placement can be found in the DRS 6.5 white paper.