4.3.4 Creating the IMS Connect configuration member You have to create a configuration member in your PROCLIB data set for specifying the environment for IMS Connect. IMS Connect uses the information it retrieves from the member to establish communication with IMS and TCP/IP. You can define several configuration members in the partition data set (PDS) to select from during the IMS Connect startup. Specify the member name to be used in the HWSCFG= parameter of the IMS Connect startup JCL (see Example 4-1 on page 45). IMS Connect configuration statement parameters You have to specify values for some of the parameters that define the way in which IMS Connect is to communicate with TCP/IP and IMS OTMA in the IMS Connect configuration member. The IMS Connect configuration member contains four types of configuration statements: HWS, TCPIP, DATASTORE, and IMSPLEX. Descriptions of the configuration statements are as follows: HWS The HWS statement specifies one IMS Connect. It includes the following keyword parameters: ­ ID The IMS Connect name. It consists of alphanumeric character data, begins with an alphabetic character, and has a length between 1 and 8 characters. ­ RACF Y (yes), or N (no). Determines whether or not the password and user ID (provided by either the client application or a user exit routine) are passed to RACF for authentication. This setting can also be changed using the IMS Connect SETRACF command. If this is set to N, no RACF validation of the user ID is done, and the user ID (if provided) is simply passed to IMS. If this is set to Y, IMS Connect calls RACF to validate the user ID and password combination before passing the request through to IMS. N is the default. Even if the value is Y, the IMS Connect user exit can set the trusted user flag and tell IMS Connect not to issue the RACF call. Important: Performance problems might occur if RACF statistics are kept for a user ID. ­ RRS Y (yes), or N (no). Defines if RRS should be enabled. This enables two-phase commit. N is the default. ­ XIBAREA Specifies the number of full words allocated for the XIB user area. Both the user initialization exit routine and the user message exit routines can access and modify the XIB user area. The default value is 20; the maximum value is 500. If you do not specify value for this parameter, or you specify a value outside of the 20 to 500 range, the system uses the default value of 20. Chapter 4. Configuring IMS Connect 47