AWS Certified Solutions Architect Associate All-in-One Exam Guide (Exam SAA-C02) by Joyjeet Banerjee

Author:Joyjeet Banerjee
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2021-05-15T00:00:00+00:00

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Figure 6-1 Application with two web servers in two different AZs

Everything is going well when all of a sudden you notice that there is an increase in the web traffic. To meet the additional traffic, you provision additional two web servers and integrate them with ELB, as shown in Figure 6-2. Up to this point you are doing everything manually, which includes adding web servers and integrating them with ELB. Also, if your traffic goes down, you need to bring down the instances manually since keeping them is going to cost you more. This is fine and manageable when you have a smaller number of servers to manage and you can predict the traffic. What if you have hundreds or thousands of servers hosting the application? What if the traffic is totally unpredictable? Can you still add hundreds and thousands of servers almost instantly and then integrate each one of them with ELB? What about taking those servers down? Can you do it quickly? Not really. Auto Scaling solves this problem for you.

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