The number of positions of benefits:
- Multiple data sources into a single data storage, so you can use a single data query engine data display.
- Alleviate resource competition on the large transaction processing database queries arising from the implementation of children generated.
- Maintain historical data.
- By integrating a plurality of data source system, so that there is no uniform central view angle in the entire enterprise.
- And description provided by encoding the same, to reduce or correct data issues, data quality.
- Consistently organize information.
- It provides a single common data model for all data, without concern for the data source.
- The reconstructed data, make data more meaningful to business users.
- To complex analytical queries deliver excellent query performance without compromising operational systems.
- Type query development decision easier.
Use of personal experience: the ability to multi-table join queries (cross-server mysql) in the hive, query large amounts of data faster. You can do data union, de-duplication and except.