That's one issue I see with NoSql, data is not normalized and consistency goes out of the window if database is big enough and the volume of data is big enough. That might not matter if you work on a search engine, social network, music suggestion app, but for most business apps and for most websites, having inconsistency is really bad.
On the other hand, having some data denormalized can improve performance as you can avoid expensive joins. It's for designer to see if they need to trade consistency for performance and in what measure. I'd avoid it, I'd prefer to add more servers, use load balancing, use caches.
On the other hand, having some data denormalized can improve performance as you can avoid expensive joins. It's for designer to see if they need to trade consistency for performance and in what measure. I'd avoid it, I'd prefer to add more servers, use load balancing, use caches.