C-Store [SEP] license
column and not by row, optimizing the database for reading of data rather than writing.
C-Store is licensed under the BSD license. Stonebraker and his colleagues have formed Vertica, a company to commercialize C-Store.
See also.
- H-Store
- 1995: Sybase IQ
Since about 2004 there have been additional open source and commercial implementations. MonetDB was released under an open-source license on September 30, 2004, followed closely by the now defunct C-Store. 
C-store was a university project that eventually, with team member Michael Stonebraker staying on, led to Vertica, which he co-founded in 2005.
The MonetDB-related X100 project evolved into VectorWise. Druid is a column-oriented data store that was open-sourced in