Actually, I read both articles. In fact, the author of the first article was my very own distributed systems professor in school. The persisting issue in both articles is a non rigorous specification of when a write actually completed. Both articles point out that a fault tolerant database should be ACID compliant, which does not live up to MongoDB’s claims.

No. New doesn’t mean broken. Hyperdex was brand new at the time and still managed to be consistent with data.