Couchio announced another user
 of CouchDB: the European Organization for Nuclear Research (CERN) — responsible for the Large Hadron Collider — in the Compact Muon Solenoid experiment:
The DMWM team has issues that don’t fit well into standard relational databases or files in a filesystem. Being able to easily access and consolidate data from distributed locations with minimal latency is required routinely. Typically, external access to a site is limited, so incoming connections to a database aren’t possible. The team often doesn’t have clear requirements to address, which means metadata is either not collected or not effectively used. Generally, the team members must prototype tools quickly and be able to demonstrate that they are ready to go into production.
In case you missed it, back in June, the same project ☞ announced the usage of MongoDB. So, wouldn’t it be interesting to hear why MongoDB was replaced by CouchDB? (in case that’s true and the two are not in fact used in parallel).
Update: according to @LusciousPear the two projects are used side-by-side.
Original title and link for this post: CouchDB Users: The Large Hadron Collider (published on the NoSQL blog: myNoSQL)