Hi all , I want to emit <key , <list of values>> as map out .. One naive solution is to use some "Text" object and a "delimiter" .. concatenate everything into one "Text" object and parse it in the Reducer. Instead I wan't to use something similar to "VectorWritable" , where I can output a "Vector" as a map value .. Which of the 2 methods is efficient and any existing implementations of the second method?
Any suggestions? Thanks.
