hashcode做任务切分 - zhanlijun - 博客园


hashcode做任务切分 - zhanlijun - 博客园

       一共M个任务以及N个线程，我们需要将M个任务均匀地分配到N个线程。

       假设各个任务有自己的任务id，简单的做法是i=id%N（i指分配到哪个线程处理）。

       但如果任务id分布不均衡将导致任务的最终分配不均衡，为了解决这一问题，一个简单的方法是对任务id进行一个hashcode转换，使得转换后的值随机分布，即i=hashcode(id)%N。


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