ADABAS D allows the installation of a distributed database.
The data can be distributed to different SERVERNODEs. A local database is called a SERVERDB. The whole database can consist of one or more SERVERDBs.
In a distributed confinguration, data can be created in different ways:
Not replicated (local)
If a CREATE TABLE statement is specified (as described in Section Creating a Table), the description of the table structure as well as the contents of the table are stored on a SERVERNODE. If this data is accessed from another SERVERNODE, a communication must be established within the network.
Replicated
WITH REPLICATION added to the CREATE TABLE statement has the effect that the description of the structure and the inserted data are available on all SERVERNODEs in the form of replications. Read operations are accelerated in this way. Modifying operations must be performed on all SERVERNODEs and are therefore more complicated and consequently, more 'expensive'.