Parallel database operation

UDS/SQL supports parallel database operation, i.e. several Database Handlers, independent and/or linked-in, can be active simultaneously in one host. (For information on the parallel use of different DBH versions on one host, see section “Using multiple UDS/SQL versions concurrently”).

It is also possible to load the DBH several times under the same user ID for different databases or DB configurations, and for several DBHs running in parallel to access a single database for reading, i.e. by means of the SHARED-RETRIEVAL option in the load parameter PP DBNAME or in the DAL command ADD DB. This also applies to shadow databases.

Figure 8: Example of parallel database operation