IMS as Coordinator
For IMS applications using the 2PC protocol, IMS acts as a coordinator and manages the 2PC processing.
A Teradata DBS becomes a resource that can be controlled by IMS system events, such as syncpoint and rollback.
For more information on the coordinator and 2PC in general, see the section on 2PC in Database Administration (B035‑1093) or Teradata Call-Level Interface Version 2 Reference for Mainframe-Attached Systems (B035‑2417).
For more information on 2PC and IMS, see IBM Database 2 V1 R1-IMS/VS Interface Guide.