Each virtual machine is allocated a certain amount of the host's hardware resources based on a number of factors as follows:
The host's or cluster's available resources
The number of virtual machines running at the same time, and the total resources consumed by them
The resources required to manage virtualization
User-defined resource limits
When you turn a virtual machine on, vCenter checks if there are enough resources available for it to run and allows you to turn it on only if there are enough resources. In case the available amount of resources don't meet the requirements, the amount of resources allocated to a VM or a resource pool may need to be adjusted.
Resource allocation settings, such as shares, reservations, and limits are used to determine the amount of CPU, memory, and storage resources available to for a virtual machine. There are several options available to administrators for allocating resources, listed as follows:
Reserving the host's or cluster's physical...