Hi, To my knowledge, its not possible with plain map-reduce. But you can try using a distributed cache on top of it. To quote a few try, hazelcast (if ur prog lang is java) or gigaspace.
Just a note, why would you want to share date across mappers. It defeats the basic assumption of map-reduce that mappers are independent work chunks. -Sudhan S 2011/8/15 谭军 <tanjun_2...@163.com> > Hi, > I want to define a matrix or list that all mappers share. > So that all mappers can do operations on it. > Can I make it? > Thanks! > > > -- > > Regards! > > Jun Tan > > >
