I think you can just define the data structures in your map classinit it in setup(Context context) and use it in your map method hope it is helpful!
2009/6/16 snowloong <snowlo...@gmail.com> > Hi, > I want to share some data structures for the map tasks on a same node(not > through files), I mean, if one map task has already initialized some data > structures (e.g. an array or a list), can other map tasks share these > memorys and directly access them, for I don't want to reinitialize these > datas and I want to save some memory. Can hadoop help me do this? > thanks > > 2009-06-16 > > > > snowloong >
