Traditional BI methodology works on the principle of assembling all the enterprise data in a central server. The online transaction processing (OLTP) transactional data is transferred to a denormalized environment called as a data warehouse. The data is usually structured with very little unstructured data.
| Big Data | BI |
|---|---|
| Data is retained in a distributed file system | Data is retained on a central server |
| Code To Data (The processing functions are taken to the data) | Data To Code (data being taking to the functions) |
| Data is of different formats, both structured as well as unstructured. | Mostly Structured |
| Data is both real-time data as well as offline data. | Mostly Offline |