Shameful copy paste from Twitter Search

We can add LB layer at two places in our system 1) Between Clients and Application servers and 2) Between Application servers and Backend server — This is a terrible copy paste from twitter search, there is no application server in the system design diagram mentioned in this topic. For a paid service atleast make sure you audit the content you publish.


Had similar issue with this - I made my own diagram and broke out the processes for writing and reading to separate paths.