MOLAP (Multidimensional Online Analytical Processing) is an online analytical processing (OLAP) that indexes directly into a multidimensional database. It processes data that is already stored in a multidimensional collection in which all possible combinations of data are reflected and each of which can be accessed directly.
Advantages of MOLAP include:
Effective data extraction
Fast query performance due to optimized storage, multidimensional indexing, and caching
Compact for low dimension data sets
Smaller sized data collection due to its compression techniques
Natural indexing due to array models
Automated computation of higher level aggregates of data