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Part 8: ELB & ASG - Coggle Diagram
Part 8: ELB & ASG
High Avaibility
Hand in hand with horizontal scaling
Running your app in at least 2 data centers
The goal is survive data center loss
EC2
Increase instance size (scale up/down)
Increase number of instance (scale out/in)
Auto scaling group
Load balancer
High avaibility
Run instance of same app in multi AZ
Scalability
Vertical
Increase the size of instance
Common for non-distributed system (database)
RDS, ElasticCache can scale vertical
Always a limit of vertical scale
Horizontal
increase number of instance for your app
Implies horizontal system
Common for web app / modern app