How easy is it to put a lock on a file while writing on it? What happens in an environment where you have multiple frontend servers that need to write to the same file? Are you going to have like one server that does the reading/writing from a file and have like a protocol with which other servers can send commands?

Great, you've just invented a half-assed DBMS.

> Great, you've just invented a half-assed DBMS.

My first thought is "Yeah, we already have one of those, it's called MySQL"

Agree, except I'd amend it as

The success of MySQL can be tied directly to people using "database" for things where what they really need is "network filesystem".

The success of SQLite can be tied directly to people using "database" for things where what they really need is "filesystem".

Interesting that it's the same dynamic at play.

Seems like. That's also what this comment on Reddit says:

http://www.reddit.com/r/programming/comments/1niheb/mongodb_...