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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.

A: 

This is like asking if there are non-brick houses. OLAP is non-relational, or rather, it's more of an application layer or optimized data structure that can live on a relational database.

You probably want to look at Pentaho - specifically Mondrian.

Ross Morrissey
OLAP engine uses Relational DB underground. SAPBW uses Oracle, etc. What I mean is 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.
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