Scalability for Dummies - Part 4: Asynchronism
This 4th part of the series starts with a picture: please imagine that you want to buy bread at your favorite bakery. So you go into the bakery, ask for a loaf of bread, but there is no bread there! Instead, you are asked to come back in 2 hours when your ordered bread is ready. That’s annoying, isn’t it?
To avoid such a “please wait a while” - situation, asynchronism needs to be done. And what’s good for a bakery, is maybe also good for your web service or web app.