Data Load Differences between ASO & BSO

Data Load Functionality	Aggregate Storage	Block Storage
Cells loaded through data loads	Only level 0 cells whose values do not depend on formulas in the outline are loaded	Cells at all levels can be loaded(except Dynamic Calc members)
Update of database values	At the end of a data load, if an aggregation exists, the values in the aggregation are recalculated	No automatic update of values. To update data values, you must execute all necessary calculations scripts
Data load buffers	The loading of multiple data sources into aggregation storage database is managed through temporary data buffers	Not Supported
Atomic replacement of the contents of a database	When loading data into an aggregate storage database, you can replace the contents of the database or the contents of all incremental data slices in the database	Not Supported
Data Slices	Aggregation storage database can contain multiple slices of data. Data slices can be merged	Not Supported
Dimension build for shared members	Full support for parent-child build method. Duplicate generation (DUPGEN) build method limited to building alternate hierarchies up to generation 2(DUPGEN2).	Support for all build methods
Loading data mapped to dates	In a date-time dimension, you can load data into level 0 members using supported date-format strings instead of member names	Date-time dimension type is not supported