Map阶段<0,"this is google">....context.write("google ->a.txt",1);context.write("google ->a.txt",1);context.write("google ->a.txt",1);context.write("google ->a.txt",1);context.write("google ->a.txt",1);context.write("google ->b.txt",1);context.write("google ->b.txt",1);context.write("google ->b.txt",1);--------------------------------------------------------combiner阶段<"google ->a.txt",1><"google ->a.txt",1><"google ->a.txt",1><"google ->a.txt",1><"google ->a.txt",1><"google ->b.txt",1><"google ->b.txt",1><"google ->b.txt",1>context.write("google ","a.txt->5");context.write("google ","b.txt->3");--------------------------------------------------------Reducer阶段<"hello",{"a.txt->5","b.txt->3"}>context.write("hello","a.txt->5 b.txt->3");-------------------------------------------------------hello "a.txt->5 b.txt->3"tom "a.txt->2 b.txt->1"kitty "a.txt->1".......
