Data sharing at the database level with multiple readers

This type of sharing allows multiple authorized IMS systems to read data concurrently with read or read-only access.

A sample configuration is shown in the following figure. Data integrity is not compromised, because no updates are allowed in this configuration.

Figure 1. Example of data sharing at the database level with read access
An z/OS operating system has 3 IMS systems (A, B, and C) that share a database. Only IMS A has read access. IMS B and IMS C have read-only access.