AWS EC2 mutiple Instances with redundant data

So I am noob, and just started learning about cloud computing and how AWS works. Aws provide us the EC2 as service, Where I can run VM and put my data on top of it or say run my web server on top of the newly created instance. I have seen people creating multiple instances in the same AZ. Doesn't that leads to Redudant data, I mean we are creating more EC2 instances in the same AZ and putting the same data on each insances, so that when one gets called off, the client can access the data from another instance. My question is this the industry practice to keep the redudant data (same data) across all the instances for better reachability or we are not putting the whole data on other instances just a fraction of it. Please don't mind my stupid question, I am just learning.

https://stackoverflow.com/questions/66149528/aws-ec2-mutiple-instances-with-redundant-data February 11, 2021 at 02:03PM