CICS® VR Version 5 Release 1 contains these changes.
CICS VR 5.1 provides replication logging capability in support of the IBM® GDPS/Active-Active (GDPS/AA) availability solution which IBM intends, in the future, to enhance to support replication of VSAM data for active-standby and active-query configurations. Currently GDPS/AA provides software replication of DB2® and IMS™ data between geographically dispersed sysplexes. The replication logging in CICS VR is intended to be used by GDPS/AA to provide replication of VSAM data updated by batch jobs under the control of CICS VR and complements replication logging capability in CICS TS 5.1 which provides the same support for VSAM files under control of CICS TS.
In CICS VR 5.1 support for replication logging provides UNDO, REDO, Tie-up records and File Close records on the same MVS™ logstream. Replication logging is activated using a new LOGREPLICATE attribute on the VSAM cluster definition. Replication logging can be activated in addition to any CICS VR UNDO or REDO logging already in place for backout or forward recovery support. If both replication logging and REDO logging for forward recovery are activated, they share the same logstream.
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DWWJUP has been enhanced to identify replication records written by CICS VR 5.1 and CICS TS 5.1.