Difference between scale in and scale-out in AWS

As a beginner, the term Scale In and Scale-Out is very confusing. These terms come under the AWS EC2 Auto Scaling.

The Scale In is basically to reduce the number of instances from the Auto Scaling Group after identifying that the load can be handled with fewer instances.

Similarly, the Scale-Out means adding more instances into the Auto Scaling Group to handle more requests coming to the server. It distributes the load to multiple instances and performance will not be impacted.

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