Specifying user data for a log stream

System logger allows 64 bytes of user specified data to be associated with a log stream and stored in the LOGR policy. The user data can be:

Specified or changed using the USERDATA parameter on the disconnect request of IXGCONN.
Read using the USERDATA output parameter on the connect request of IXGCONN.

If an application codes the USERDATA parameter on a connect request when there is no user data associated with the log stream, IXGCONN returns a USERDATA field containing all zeros.

Only one copy of the log stream user data exists and any application connected to the log stream can update this copy when they disconnect. If you will have multiple connectors to a log stream, you should consider using serialization or another protocol to protect the USERDATA field.