Select the duplexing option

Duplexing allows you to create copies of the logstreams on DASD. You must provide the name of the prefix for the duplex data set, the SMS data class, and the SMS storage class.

When you specify duplexing, a copy of the coupling facility log stream data is maintained in DASD staging data sets, one per log stream on a system.

If you specify COND, the coupling facility log data will be duplexed only if an application's connection to the log stream contains a single point of failure and permanent log data loss can occur. If a coupling facility is failure-independent, logging does not take place.

If you specify UNCOND, the log data for the coupling facility log stream will be duplexed in staging data sets, unconditionally, even if the coupling facility is failure-independent.

For information, see z/OS Setting Up a Sysplex, SA22-7625.

Valid values: COND or UNCOND