Wherever possible, it is always good to combine multiple goals into the same job to avoid extra I/O and additional job bootup/cleanup overheads. Optimisers in Hive and Pig try to do this as well. The reducer can emit different outputs via the MultipleOutputs classes. For map outputs, you'll need to build some form of "general" class and hierarchy that can cater to different styles of output and partition them appropriately. Its definitely possible, but needs some additional work. ... View more