Amazon EC2 Auto-Scaling Concepts

From NovaOrdis Knowledge Base
Jump to navigation Jump to search

External

Internal

Overview

Auto-scaling is an Amazon EC2 functionality that insures that an optimal number of EC2 instances are started and maintained running, to handle the load of a specific application. The EC2 instances whose number is controlled this way are part of an auto-scaling group.

Auto-scaling allows for scaling plans', which control the number of active instances as the demand on the application increases or decreases.

Auto-Scaling Group

Auto-scaling ensures that the number of EC2 instances in an auto-scaling group does not go below a minimum size and above a maximum size. The group has a desired capacity.

Launch Configurations

Scaling Plans