Coupling facility logging

If coupling facility logging is used on all the systems in the sysplex, then you only need to run scan on one system to update the RCDS. Scan connects to all the log streams registered in the RCDS on all the systems it has access to using the coupling facility.

If both coupling facility logging and DASD-only logging are used on systems connected to the sysplex, the two types of logging must be handled separately. You only need to run scan on one of the systems using coupling facility logging to update the RCDS. You must run scan on each of the DASD-only logging systems to update the RCDS. Scan cannot connect to systems with DASD-only logging from another system in the sysplex on those systems.

If you want to access the RCDS from more than one MVS system, you must have Global Resource Serialization (GRS) installed.