Before you enable Db2 data sharing

You must take certain actions to prepare your environment for Db2 data sharing.

Connecting CICS to Db2 (optional)
Before you enable data sharing, connect CICS® to each member. The CICS attachment facility command, DSNC STRT, lets you override the subsystem name on startup.
Connecting Db2 to IMS (optional)
Before you enable data sharing, attach IMS to every member that runs IMS applications. IMS must include a separate member SSM for every member Db2.
Registering the command prefixes, member group attachment name, and subgroup attachment name
Before you enable data sharing, register the command prefix for a member, the group attachment name, and the subgroup attachment name for the group.
Increasing the size of the BSDS
Data sharing causes additional records to be written to the BSDS for member information.
Increasing the size of the SYSLGRNX table space
The SYSLGRNX directory table space contains the relative byte address (RBA) ranges showing when data sets are open for updating.
Database design recommendation
You should partition table spaces as much as possible and use as much separation of I/O as possible.

Parent topic: Planning for Db2 data sharing

Related concepts

Disabling and re-enabling Db2 data sharing
Deadlock detection and resource timeouts in data sharing environments

Related tasks

Enabling Db2 data sharing
Migrating an existing data sharing group to Db2 13