It depends on the use case does not it. Shared nothing is the best architecture for e-commerce search for instance. But if you have one query every minutes or

It depends on the use case does not it. Shared nothing is the best architecture for e-commerce search for instance. But if you have one query every minutes or so for a 1TB dataset, it feels a bit silly to have a couple of servers dedicated to it doesn't it? Imagine this is the case for all big data search you can think of... Logs, emails, etc. This is a waste of CPU and RAM.