This is not easy task what AWS lamda can do :). You can run the same code on one machine and 1000 machines if needed depends on load. But as developer you don’t care where it runs and how many machines you will need.
The best part you only pay for work AWS lamda do for you , not machines you use for it.
The drawback you need to keep state somewhere else also there is limit how long computation can be executed (I suppose there is 5 minutes)
