Database Software

Here is the scenario
version: 11gR2 for standby and primary

Currently running
rman target sys/xxx@PROD1 auxiliary sys/xxx@stby

run {
duplicate target database to 'stby' from active database nofilenamecheck;
}

If I kill this process then what will happen.
Do I need to do any manual cleanup after killing the rman job?
Actually I ran duplicate database from node1 (By mistake) and want to run from all 4 nodes at the same time which will save me a good time.

Kindly let me know if anyone got experience in killing the job in middle won't affect Prod box.
I am pretty much sure that nothing will happen to PROD but just to be on safe side I want to be sure that the job dosen't affect PROD in anyways.

How to see the progress of RMAn from auxiliary database? v$session_longops???