storm的集群表面上看和hadoop的集群非常像。但是在Hadoop上面你运行的是MapReduce的Job, 而在Storm上面你运行的是Topology。
它们是非常不一样的 — 一个关键的区别是： 一个MapReduce Job最终会结束， 而一个Topology运永远运行（除非你显式的杀掉他）。

        Config conf = new Config();

        //设置work的数量

        conf.setNumWorkers(2);

        //设置Excutor的数量

        TopologyBuilder topologyBuilder = new TopologyBuilder();

        topologyBuilder.setBolt("blue-spout", new BlueSpot(), 2);

        topologyBuilder.setBolt("green-bolt", new GreenBolt(), 2).setNumTasks(4).shuffleGrouping("blue-spout");

        topologyBuilder.setBolt("yellow-bolt", new YellowBolt(), 6).shuffleGrouping("green-bolt");

//Reconfigure the topology "test" to use 5 worker processes

//the spout "blue-spout to use 3 executors and the bolt "yellow-bolt" to use 10 executors."

storm rebalance test -n 5 -e blue-spout=3 -e yellow-bolt=10