Relating T2 to OLAP
T2 also computes aggregates
- targets distributive and algebraic functions
- usually do not compute aggregates of aggregates, though could with mult-step queries
T2 mapping functions may use multiple dims
T2 data chunks similar to dense data cubes in MOLAP
- cannot compute address from dim values if chunk elements are irregularly spaced (eg Titan)
OLAP servers separated from data warehouses