CICS applications

Use this page to determine how CICS can use the GROUP unit of recovery disposition.

CICS 4.2 and later provides the group resynchronization option, RESYNCMEMBER(GROUPRESYNC) in an MQCONN resource definition. A CICS configured with this option can connect to any suitable queue manager in a queue sharing group which is running on the same LPAR as that CICS region. To support the CICS GROUPRESYNC option, a queue manager must be running at MQ V7.1 or later, and be enabled for GROUPUR support.

Transactions running within a CICS region connected to MQ using GROUPRESYNC create units of work with GROUP unit of recovery disposition.

We can use RESYNCMEMBER(GROUPRESYNC) to enable faster recovery after a queue manager failure as it enables the CICS region to immediately connect to an alternative eligible queue manager running on the same LPAR, resolving any indoubt transactions as necessary, without waiting for queue manager restart.

RESYNCMEMBER(GROUPRESYNC) also enables more flexible restart options for CICS. A CICS region with its MQ connection configured to use GROUPRESYNC and MQ shared queues can be restarted on any LPAR where there is a queue manager running as a member of the same queue sharing group.

Parent topic: Application support