Starting and stopping DDF in data sharing
You control the distributed data facility (DDF) on a member basis, not on a group-wide basis.
-DB1A STOP DDF MODE(QUIESCE)
To stop all DDF processing for the group, you must issue the STOP DDF command for every member of the group. For example, you might need to do this when you change the SYSIBM.LOCATIONS table.
To allow for completion of CREATE, ALTER, DROP, GRANT, or REVOKE operations from remote requesters, issue the STOP DDF MODE(SUSPEND) command.