Cocroachdb's storage format

I like CockroachDB, but I was just wondering about its architecture; is it a column store like Vertica, or a row-store like MySQL?

thanks

It’s a general purpose row-based store. SQL data is mapped to one or more key-value pairs per row and stored in an embedded instance of the RocksDB key-value store.

For more on the architecture of CockroachDB, you might be interested in reading its design doc.