Therefore, SLAs cover the entire cloud and are offered by service providers as a service-based agreement, not as a customer-based agreement. Measuring, monitoring, and reporting cloud performance is based on the end-user experience or its ability to consume resources. The disadvantage of cloud computing over SLAs is the difficulty of determining the cause of downtime due to the complex nature of the environment. How many users can this server handle? Can I run the SQL database application and an Exchange application on a computer? How many users can I deal with this Exchange server at the same time? Capacity planning in the Windows world is often a guess. It is not always clear what hardware is needed to meet the specified requirements.