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Elastic Load Balancing & Auto Scaling Groups

Scalability & High Availability

Vertical Scalability

Horizontal Scalability

High Availability

High Availability & Scalability For EC2

Scalability vs Elasticity (vs Agility)

Scalability Elasticity Agility
ability to accommodate a larger load by making the hardware stronger (scale up), or by adding nodes (scale out) once a system is scalable, elasticity means that there will be some “auto-scaling” so that the system can scale based on the load. This is “cloud-friendly”: pay-per-use, match demand, optimize costs (not related to scalability - distractor) new IT resources are only a click away, which means that you reduce the time to make those resources available to your developers from weeks to just minutes.

What is load balancing?

Why use a load balancer?

Why use an Elastic Load Balancer?

What’s an Auto Scaling Group?

Auto Scaling Groups Scaling Strategies

ELB & ASG Summary

EC2 Instance Storage            List           Amazon S3

You Can Purchase PDF :     AWS Cloud Practitioner Study Notes (PDF)