Hello, with org.apache.cassandra.hadoop.ConfigHelper.setInputColumnFamily I can set up the map phase to read from one column family. Is it possible to have multiple mapper classes each mapping over their own column family so that data from multiple column families can be "joined" in the reduce phase? I didn't find any documentation on how to do that.
One workaround I see is to do several MRs write the data from the different column families in a single helper column family and then do the desired computation but I am trying to avoid that if possible. Any suggestions on how to do this without running multiple MRs and instead read from multiple column families in one go? Thanks. -- Markus
