CA IDMS Environment › Overview › Data Sharing Environment

Data Sharing Environment

A data sharing environment is one in which multiple central versions operate cooperatively through the coupling facility services of IBM's parallel sysplex architecture. Each CA IDMS/DC or CA IDMS UCF system that is to participate in a data sharing environment must be a member of a data sharing group. There can be any number of data sharing groups within a sysplex, but a central version can belong to only one group at a time.

The primary advantage of data sharing is that more than one central version can update a database concurrently. In fact, every member of a data sharing group can simultaneously update one or more databases. This enables more than one central version to service a given type of transaction, thereby providing both increased transaction throughput and fault tolerance in the event of failure.

The following diagram illustrates a data sharing group. It consists of four members (CUST01, CUST02, CUST03, and CUST04), each of which share update access to the same set of databases (Inventory, Customer, and Financial).

Note: For more information about data sharing, see the CA IDMS System Operations Guide.