Fault ToleranceДЇault Tolerance is the ability of a system to remain up and running during component and service failure.ДЇor example, your application hosted on an App Service, VM or any other compute service, should remain up and running even if underlying server hardware fails.ДЄ fault-tolerant cloud system will be able to manage to quickly shift to another copy of the server in the data-center whenever any failure is identified. On the other hands, it takes days or weeks when we submit a request to purchase a physical server and by when it gets delivered.ДЄgility enables users to be able to allocate and deallocate the resources very quickly, and that is a huge benefit of cloud.

In cloud, it takes a minute or two to create a Virtual Machine that is up and running. Adding more instances to scale is scaling-out, and reducing the number of instances is scaling-in.Д®lasticity is the ability of the system to scale automatically. Similarly, we can reduce the active instances once the workload goes down. Horizontal Scaling: In this type of scaling, compute capacity can be increased by adding more instances to support increased workload. Adding more compute power is scaling-up, and reducing the same is scaling-down. Later, the same can be reduced when the workload decreases. Vertical Scaling: In this type of scaling, compute capacity of an existing resource is increased by adding more compute power (RAM or CPU) to support increased workload. Scaling is the process of of allocating (adding) and deallocating (removing) resources to support desired workload. Scalability is the ability of a system to scale to support desired workload. Cloud ConceptsД«elow are major cloud concepts in Azure or any other cloud platform. Hard DriveДelivery of services like compute, storage and networking over the internet is known as Cloud Computing, and the provider of such services is known as Cloud Provider. Storage - Storage is the volume of data that you can store on your computer.Compute Power - Compute Power is how much processing your computer can do.Compute Power & Storage are the two most basic services provided by all cloud providers.

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