Answer Posted / fatma
ROLAP Cubes: stands for Relational OLAP. In ROLAP cubes a
copy of data from the fact table is not made and the data
aggregates are stored in tables in the source relational
database. A ROLAP cube is best when there is limited space
on the Analysis Server and query performance is not very
important. ROLAP local cubes contain the dimensions and
cube definitions but aggregates are calculated when they
are needed. ROLAP cubes require less storage space than
MOLAP and HOLAP cubes.
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