There was a time when this was the hard part, but at this point the "scale it up" search space has been explored quite effectively by a lot of different groups to the point where the only reason anyone below the "system architect" level would need to know the ins and outs of this particular subject is because the company has a deep-seated NIH syndrome.
Scaling a system to the Google, Facebook, or Twitter level is hard, but getting to half of their size using off the shelf components is not. Getting the rest of the way on this journey is not something that mid-level tool and front-end coders should ever have to deal with. If they do need to know this information then you are doing it wrong...
There was a time when this was the hard part, but at this point the "scale it up" search space has been explored quite effectively by a lot of different groups to the point where the only reason anyone below the "system architect" level would need to know the ins and outs of this particular subject is because the company has a deep-seated NIH syndrome.
Scaling a system to the Google, Facebook, or Twitter level is hard, but getting to half of their size using off the shelf components is not. Getting the rest of the way on this journey is not something that mid-level tool and front-end coders should ever have to deal with. If they do need to know this information then you are doing it wrong...