Database tier

The database tier consists of the LN database driver and the database server. The database driver provides a common interface between the LN application virtual machine and the database server. Communication between the application virtual machine and the database driver is the same, no matter which RDBMS product you use as the database server.

One database driver exists for each of the RDBMS products that LN supports.

Communication between the database driver and the database server is tailored to the RDBMS you use. The database driver communicates with the RDBMS through structured query language (SQL) statements and the native application programming interface (API) of the RDBMS.

The database server consists of one of these third-party RDBMS products:

• Oracle
• DB2
• Microsoft SQL Server

All LN application data is stored in a relational database managed by an RDBMS. You can have multiple RDBMS products in one LN installation, with some data in one database server and other data in another.