A data sharing group is a collection of one or more DB2 for z/OS subsystems that share DB2 data. A DB2 subsystem that belongs to a data sharing group is a member of that group. Each member can belong to one, and only one, data sharing group. All members of a data sharing group share the same DB2 catalog and directory, and all members must be in the same Parallel Sysplex. Data sharing improves the availability of DB2 data, extends the processing capacity of the system, provides more flexible ways to configure your environment, and increases transaction rates.
The SQL statements that are used by an application can run on multiple subsystems. If these subsystems are members of a data sharing group, you can configure a database group in the client to contain the same members. You can then define a workload to contain all SQL statements of the application from the statement cache, and capture the workload from the data sharing group.
To configure a database group in the client: