Common Communications Interface › z/OS Parallel Sysplex Configurations › Configure CAICCI for XES

Configure CAICCI for XES

To configure CAICCI for XES

1. Ensure that you have the prerequisite hardware and software enabled. z/OS should be configured to operate in a parallel sysplex, with one or more coupling facilities.

   Note: For information about how to set up XES and coupling facility structures, see IBM's z/OS MVS Setting Up a Sysplex.

   Use the IBM IXCMIAPU administrative data utility to define the CAICCI coupling facility structure.

   Note: For information about the IXCMIAPU administrative data utility, see IBM's z/OS MVS Setting Up a Sysplex.

   Your input should be similar to this:

   STRUCTURE NAME(name)
   SIZE(size)
   PREFLIST(cf_name)
   

   name

   Defines the name of the structure you want CAICCI to use.

   size

   Specifies the size of the structure in 4-KB units. Typically, a value of 1000 (4 MB) should suffice, but the optimum size depends on your workload and communication volume.

   cf_name

   Specifies the name of the coupling facility in which you want the structure defined.

2. Ensure that CAICCI on each host has a unique identifier assigned by the following control option:

   SYSID(sysid)
   

With these definitions in place, CAICCI will use XES services to communicate among z/OS systems in the sysplex. You may want to monitor the CAICCI coupling facility structure periodically to ensure that it is of adequate size. CA SYSVIEW Performance Management and similar performance monitors can provide this information.

Note: If you define an LU0 node and connect for a system that may also connect using XCF or XES, the first connection to complete will be the active one. The other protocol will cancel its attempt. This may cause the following messages to appear in your CAIENF job log:

CAS9603I - CAICCI Group CCIXCF  from System @@@@@
CAS9602E - CAICCI SYSID sysid  could not be logged on

These messages will recur as part of normal recovery and not cause problems with CAICCI or the products using it.