Resource capacity

Many enterprises have chosen to embrace a private cloud model for running their IT infrastructures. These organizations face specific capacity management challenges.

Capacity planning enables you to ensure that sufficient resources exist in your environment and that your infrastructure is working efficiently.

Capacity planning has the following benefits:

• Ensures the performance of service-level agreements
• Increases use and reduces costs
• Plans better by performing what-if modeling

Before we talk about capacity in more detail, let’s go over some of the basic resource capacity concepts and terms used.

Overview and concepts

The following table lists terms that are used to understand resource capacity usage in a virtual environment:

Term	Definition
Total capacity	All the configured capacity
Limit	User-defined capacity limit (maximum limit)
Reservation	User-defined capacity that is booked (reserved)
Entitlement	Determined by the system based on shares, reservation, and limit
Overhead	Small amount...