[AWS] High Availability and Scalability for EC2 정리

Vertical Scailng : Increase instance size (= scale up / down)

 - From: t2.nano (- ECU, 1 vCPUs, 2.4 GHz, -, 0.5 GiB 메모리, EBS 전용)

 - To: u-6tb1.112xlarge (- ECU, 448 vCPUs, 2.1 GHz, -, 6144 GiB 메모리, EBS 전용)

Horizontal Scaling : Increases number of instances (= scale out / in)

 - Auto Scaling Group

 - Load Balncer

High Availibility : Run instances for the same application across multi AZ

 - Auto Scaling Group multi AZ

 - Load Balancer multi AZ