-1

I wonder if they use a relational database like MySQL or do they opt for a NoSQL like CouchDB or MongoDB.

The Bitcoinica source code reveals that they used a MySQL database.

2

There are multiple Bitcoin Exchanges out there, most likely they are using different DB Systems.
To be sure you should contact the particular representatives of the Exchanges.

| improve this answer | |

Not the answer you're looking for? Browse other questions tagged or ask your own question.