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I dont think there is an easy solution for your case. Here are my ideas: 1. Copy source data from cluster B to cluster A and ingest it normally (f.e: DistCp). 2. Mount hdfs from cluster B locally on middlemanagers and use 'local' inputSource in ingestion spec 3. If cluster B has webhdfs then maybe use HTTP inputSource 4. Deploy separately middleManagers for cluster B, but this will split deepstorage, idk. 5. Probably there is a way to override peon classpath/config

Thanks , Yes its not going be easy