Configuring and Customizing Your Product › Define Your Product to VTAM (Optional) › Example of an Application Definition Table › ACBs in an XCOMPLEX Environment

ACBs in an XCOMPLEX Environment

Important! The existing XCOMPLEX facility has been deprecated. The following information is provided for backward compatibility only. All new installations should use the new PLEXQ implementation. Existing XCOMPLEX users should migrate to the PLEXQ infrastructure for their XCOMPLEX functionality. Refer to section “Create a PLEXQ Environment (Optional)” in this guide.

If you are running in an XCOMPLEX environment, define a sufficient number of minor ACBs for each XCOMPLEX Worker Server and XCOMPLEX Admin Server to handle the workload. Use the following guidelines when setting up your environment to ensure an appropriate number of minor ACBs are defined:

• Determine how many XCOMPLEX Worker Servers are workers to the XCOMPLEX Admin Server and how many transfers are requested from the XCOMPLEX Admin Server. If you have two XCOMPLEX Worker Servers, XCOMA and XCOMB, with 10 minor ACBs defined for each (XCOMA00 to XCOMA09 and XCOMB00 to XCOMB09 respectively). Then the XCOMPLEX Admin Server XCOMC has a sufficient number of minor ACBs defined to be equal to or greater than all the XCOMPLEX Worker Servers minor ACBs combined. If you define XCOMC with minor ACBs XCOMC00 to XCOMC25, then it ensures your XCOMJOBs will not fail due to a lack of minor ACBs accommodates any future expansion.
• Determine the type of jobs. For example:
  • TYPE=SCHEDULE jobs use a minor node only for the length of time that is required to schedule the transfer.
  • TYPE=EXECUTE jobs use a minor node for the entire transfer.
  • TYPE=INQUIRE jobs use a minor node until the status for the transfer is COMPLETED, or the inquire time has expired.
  • TYPE=HISTORY jobs use a minor node for the length of time that is required to run the job.
• Determine the number of ISPF dialogs to use. These use minor nodes as well. The length of time the ISPF dialogs hold on to the minor ACBs follows the XCOMJOBs. Using ISPF to do TYPE=SCHEDULE dialogs requires less time than TYPE=EXECUTE or TYPE=INQUIRE dialogs.