f73f5600__PDW__and_ROLAP___ORAYLIS_Blog__ly_available_to_the_end_users_
[LOW LATENCY] NO/LESS STORAGE REQUIRED
The ROLAP cube only contains the model, not the data. Therefore almost no disk space is required for storing the cube. It’s just the presentation of the model. The MOLAP/ROLAP is a technical implementation issue which is not visible to the end user. For both options, the end user gets an easy to use, highly interactive quick responding data model, which can be used from many tools including Excel pivot tables, Reporting Services, Tableau and other advanced analytical frontend tools.
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)