some CICS migration guidelines

Check software and hardware requirements

  • Disk space
  • Maintenance levels
  • HFS (SMS) for java bits and pieces etc
  • IMS and/or DB2 releases plus other related software.
  • Third party products?

Research and apply any required maintenance
Be aware of changes to CICS-supplied transactions

  • Changed CEMT commands
  • New CEMT commands
  • Changes to CETR
  • Changes to CDBM
  • Changes to CEBR
  • New CBAM transaction
  • CWBC obsolete

Review changes introduced with this release including the following…

  • System initialisation parameters
  • Additions to CICS RACF category 1 transactions
  • Resource definition (online) changes
  • Resource definition (macro) changes
  • The application programming interface (API)
  • The system programming interface (SPI)
  • CICS-supplied utility programs
  • The global user-exit programming interface
  • The exit programming interface
  • The task-related user-exit programming interface
  • The external CICS interface (EXCI)
  • User-replaceable modules
  • Monitoring and statistics

Follow ServerPac dialogs
Integrating CICS and OS390
(Some of these tasks will already be in place for existing CICS also some tasks can wait.)

  • Authorise the hlq.SDFHAUTH library
  • Authorise CICS regions to access MVS resources
  • Define the default CICS userid to RACF
  • Install CICS-required modules in the MVS linklist
  • Define CICS as an MVS subsystem
  • Install the CICS Type 3 SVC
  • Decide whether to use the high-performance option
  • Define CICS regions as applications to VTAM
  • Install CICS modules in the MVS link pack area
  • Define CICS IPCS exit control data to MVS
  • MVS Program properties table entries
  • MVS performance definitions
  • MVS automatic restart management definitions
  • MVS cross-system MRO definitions
  • Definitions required for VSAM RLS support

Review messages and automation
Defining the logger environment for CICS journaling
Applying service to CICS Transaction Server for OS/390
Perform IVPs
Convert a test region and check it out
Tasks required for converting a region include

  • Decide whether to share CSD’s.
  • Create the necessary unique datasets (temporary storage, transient data etc)
  • Create the JCL
  • Convert the SIT
  • Assemble any necessary tables
  • Define the RDO objects
  • Integrate DB2 / MQSeries etc
  • Is there a relevant model in the logging structure for journaling etc?