ADI

Stabilized feature: The Extended Recovery Facility (XRF) in CICS® is stabilized. Consider alternative technologies that provide more flexible high-availability solutions for modern workloads. These solutions include the z/OS® Automatic Restart Manager (ARM), CICS data sharing, VTAM® persistent sessions, and use of the cross-system coupling facility. See also Stabilization notices and discontinued functions.

The ADI system initialization parameter specifies the alternate delay interval in seconds for an alternate CICS region when you are running CICS with XRF.

For information about the XRF system initialization parameter, see XRF.

Defining ADI

You can define the ADI system initialization parameter in the following ways:
  • On the PARM parameter of the EXEC PGM=DFHSIP statement
  • In the SYSIN data set of the CICS start up job stream
  • Through the system console
  • In the DFHSIT macro

Values for ADI

ADI={30|number}
Valid values for the ADI system initialization parameter are as follows:
30
30 is the default value for ADI. This specifies an alternate delay interval of 30 seconds.
number
Specifies the alternate delay interval in seconds. The minimum delay that you can specify is 5 seconds. This is the time that must elapse between the (apparent) loss of the surveillance signal in the active CICS region, and any reaction by the alternate CICS region. The corresponding parameter for the active region is the PDI system initialization parameter. The ADI and PDI system initialization parameters need not have the same value.
Note: You must give careful consideration to the values you specify on the ADI and JESDI system initialization parameters so that they do not conflict with your installation's policy on PR/SM RESETTIME and the XCF INTERVAL and OPNOTIFY intervals. You should ensure that the sum of the interval you specify on the ADI system initialization parameter plus the interval you specify on the JESDI system initialization parameter exceeds the interval specified by the XCF INTERVAL and the PR/SM policy interval RESETTIME.