Creating and Configuring an Enterprise Server Region for IMS

To run IMS applications, you must create an enterprise server region that is MSS-enabled and appropriately configured to run an IMS application. You can do this from Enterprise Server Administration.

Creating and configuring an enterprise server region from Enterprise Server Administration

When you create an enterprise server region from Enterprise Server Administration with the intent to run an IMS application on the enterprise server, you must configure the following as a minimum:

When initially creating the enterprise server region, specify:

A name for the enterprise server region
Mainframe Subsystem Support
Working mode, 32- or 64-bit
Specify a TN3270 listener and port number

Manually configure the following:

Enable IMS
Specify a System Initialization Table (SIT)
Specify the location of:
- Application files
- Database files
- Generated files
- Maps/MFS files
- Transaction files
Specify a message processing region (MPR)

Optional IMS configuration:

You can also configure the following, based on the needs of your IMS application:

If your IMS application contains JCL, you must also configure the enterprise server for JCL
If you want to use IMS Connect to connect to the database, enable IMS Connect
Create a resource group
Add a resource group to a startup list
Define transactions
Calculate shared memory area requirements
Specify printers

Important:

Migrated IMS applications do not require that you define services, request handlers or implementation packages; however, you should not delete the system services and request handlers that are automatically associated with an enterprise server when you create it.
Resources, SITs and startup lists are all CICS concepts. However, our IMS support in Enterprise Server is closely integrated with support for CICS, and as a result, much of the configuration necessary to run CICS applications in an enterprise server is also necessary to run IMS applications. If you are not familiar with CICS concepts, we suggest you read MSS and CICS Support before continuing.
Our Enterprise Server product includes many tools and features you can use with IMS applications but that are not specific to IMS applications. Read the Configuration and Administration section to become familiar with other features you might find useful.