Data Tier

The IBM Cognos BI contains data tier contains-

• Content Store
• Data Sources
• Metric Store

Content Store- 

The content store is a relational database. It contains data related to report specification, published models and the packages that contain them. It also stores the connection information of data sources and information about the external namespace, cognos namespace and information about scheduling and bursting the report.

  The IBM Cognos service that uses content store is content manager. Design models and log files are not stored in content store. 

  

Data Sources- 

The data sources contains relational databases, dimensional or OLAP cubes, flat files and other physical data stores. It also contains connection information necessary for accessing data.

Application tier components use data source connections to access data sources.

Metric Store-

Metric store is also a relational database. It contains content for metric package, metric studio setting ( example- user preference)