EXPDP backup with cluster parameter to create on a Node in RAC
In a RAC database, if you are taking export with parallel option then if you want that datapump directory is not shared between the nodes,
then you need to set paramete CLUSTER=N in expdp/impdp.
EXPDP example with CLUSTER parameter
If using parallel, then not for creating the datapump backup on different nodes.
EXPDP dumpfile=asset_%U.dmp logfile=asset.log directory=DBBACKUP parallel=8 cluster=N