Hey Arun, the short answer is you spin up VDB's of the data you want to put into Hadoop and then use the same tools you would use for those physical data sources. For example, if you have an Oracle DB you want to get into Hadoop, you would create an Oracle VDB and then use something like Hadoop Loader to load the data into Hadoop.
Delphix stores all data as filtered, compressed, deduped blocks and that data is not externally accessible to any systems. There is no way to directly pump the blocks from Delphix into Hadoop.