and facebook has had to spend millions in making it work for their use-cases. it's not like facebook just enables the --scale flag for vanilla mysql and then wa

and facebook has had to spend millions in making it work for their use-cases. it's not like facebook just enables the --scale flag for vanilla mysql and then walks away. not saying they'd be able to make vanilla mongo scale to their needs without serious investment either, but saying "facebook uses this so therefore it's good enough for me" discounts a lot of work that goes into making those solutions work for their needs/scale.