[fiveo]

Since I cannot edit my original comment (no idea why), I'd put my update here:

Looks like the people that replied my post got into deep technical discussion without mentioning a startup in the scale of Twitter. Exactly like what the author pointed on: no successful product yet.

I hope people can see a pattern here: Twitter: FlockDB, and varieties of supporting infrastructure Facebook: Cassandra and in-house tools Google : GFS, BigTable, and in-house tools LinkedIn: Voldermort + varieties of supporting tools

Each successful startup build NoSQL solution based their own needs.

Better make sure your needs align with them sir.