CICS Operations

This section describes how to use CICS operational functions.

The CICS perational functions include the following ones:

  • Substation ES CICS Region Resources
    Substation ES CICS resources are defined at installation and used by Substation ES during execution.
  • Substation ES in a CICSplex Environment
    Workload Manager (WLM) of CICSplex SM uses the dynamic routing program EYU9XLOP to route eligible work requests from a requesting region to a suitable target region selected at the time the transaction is initiated.
  • Methods of Invocation
    The following table describes the constraints and usage of Substation ES methods of invocation in a CICSplex environment.
  • Services without Conversion Rules
    Substation ES services can handle communications without the requirement for conversion rules. When this method is used, Substation ES services do not require the definition of conversion rules to communicate with CICS applications or create ESB messages.
  • Containers and Processes
    Substation ES supports two CICS container types: multiple containers and a single container. All containers within UoW are transmitted over a single channel.
  • Invoking Multiple Resources
    The Invoke Multiple CICS Resources feature allows one RV or EMS message received by Substation ES to produce up to five similar invocations to different resources in a CICS address space.
  • Using FastPath Trigger Processes
    To improve the performance when processing trigger messages, Substation ES has FastPath trigger definitions. These definitions have a shorter instruction path and minimal API calls to TIBCO Rendezvous or TIBCO Enterprise Message Service. The result is faster processing of trigger messages and less CPU used to accomplish trigger publishing.
  • Invocation of CICS Programs to Access DB2
    You can write programs in COBOL, PLI, C, and Assembler to access DB2. For Substation ES to execute these programs, they must be able to take input and deliver output in one of following ways:
  • Trigger and Recipe Performance
    You can have a general understanding for the components that affect the performance of Substation ES trigger and recipe processes.
  • CICS Request/Reply
    This section explains CICS Request/Reply (CRR) operations. The CICS Request/Reply facility provides an easy-to-use method for requesting information from ESB services.
  • CICS HVT Triggers
    This section explains CICS HVT triggers that you can choose to use in certain situations.
  • CICS Trigger Queue Verify Task
    SXTV reads HVT queues and verifies that the record headers are in proper sequence.
  • CICS 3270 Assistance Task
    Substation ES provides SXTH, a CICS 3270 task that performs the following items:
  • CICS 3270 Dead Message Queue Task
    Substation ES provides SXTD, a CICS 3270 task that performs the certain functions.
  • CICS Security Settings
    This section describes the security settings in CICS.
  • Operations Cookbook
    The section describes the operations that you might perform and the related procedures.