[rkangel]

PostgreSQL is really really good, for any normal amount of data, or any normal number of users. If you can make Postgre do most of the work, it doesn't hugely matter what you build on it.

If you're Facebook or Google scale, you may need something with a different performance characteristics, but 99.9% of the world doesn't. Except that even Facebook doesn't: as I understand it they still use carefully sharded MySQL.

[haffla]

Yes I guess with the right hardware everything is possible. The question is if you can get away with smaller hardware when using non-relational databases. Well one would have to test this.