Changes for this edition are indicated by vertical lines to the left of the changes.
Changes for CICS® Transaction Server for z/OS®, Version 3 Release 1
No changes for this release.
Changes for CICS Transaction Server for z/OS, Version 2 Release 3
No changes for this release.
Changes for CICS Transaction Server for z/OS, Version 2 Release 2
There is a minor change to the CICS-DBCTL statistics. See DBCTL statistics.
Changes for CICS Transaction Server for z/OS, Version 2 Release 1
IMS™ now takes advantage of the CICS single updater syncpoint optimization, which allows CICS to use single-phase commit instead of two-phase commit where DBCTL is the only recoverable resource used in a particular LUW. This avoids writing unnecessary log records, decreases transaction cost and improves response time. Information on this has been added to Performance parameters in CICS, Summary of DBCTL abends and return codes and PAPL request and return codes.
Changes for CICS Transaction Server for OS/390®, Version 1 Release 3
DFHDBFK, the DCBM group command file, was added.
Changes for CICS Transaction Server for OS/390, Version 1 Release 2
The new DBCTLCON system initialization parameter is described, in Defining CICS system resources for DBCTL.
Changes for CICS Transaction Server for OS/390, Version 1 Release 1
The following topics have been added or changed since the CICS/ESA 4.1 edition:
Changes for the CICS/ESA 4.1 edition
The following topics have been added or changed since the CICS/ESA 3.3 edition:
Changes for the CICS/ESA 3.3 edition
The book has been updated to reflect the replacement of the following system initialization parameters: