like non-sql db but for olap. In Opensource of course :)
Edit:
OLAP engine uses Relational DB underground. For example SAPBW can use Oracle, etc. What I mean is kind of OLAP engine WIHTOUT underlying Relation DB like a sort of Google BigTable with OLAP functionality.
OLAP DB can be gigantic since BigTable is about the same amount of Data, I want to know if anybody has made a model for fusionning both.