f73f5600__PDW__and_ROLAP___ORAYLIS_Blog__ly_available_to_the_end_users_
[LOW LATENCY] MORE FLEXIBLE
In MOLAP, many changes to a dimension require a full processing of the dimensions which results in all the attached measure group partitions switching to the ‘unprocessed’ state and need to be processed again. If you have a large cube, this process could take many hours. In ROLAP, all this is not necessary. Changes to cube dimensions are online immediately.
Parallel Data Warehouse (PDW) and ROLAP « ORAYLIS Blog
No need to process MOLAP partitions: low latency (data in the relational data warehouse tables are immediately available to the end users)