> MongoDB(page based storage) Citation needed. Which database system on earth doesn't do page based storage? In fact, you cannot get any durability guarantees

> MongoDB(page based storage) Citation needed. Which database system on earth doesn't do page based storage? In fact, you cannot get any durability guarantees if you don't write page-at-a-time. MongoDB is relying on the operating system's cache manager by using memory mapped files. Whether that is a good idea depends a lot on your operating system, and whether it's page replacement algorithm fits your database use case. Most database implement their own page cache because they want tighter control over those algorithms. I like MongoDB's data model, I don't understand their choice of query language, and I think their database engineering is odd to say the least. What's the point in having a non-durable system if you don't even get scalability across nodes? Where's the hot backup? And so on. It seems like something people use who just couldn't figure out indices in relational databases, just to run around and tout that NoSQL is so much faster :-(