title: Differences between MapReduce and Yarn
body: <p>I was searching about hadoop and mapreduce with respect to straggler problems and the papers in this problem<br>
  but yesterday I found that there is hadoop 2 with Yarn ,,<br>
  unfortunately no paper is talking about straggler problem in Yarn<br>
  So I want to know what is difference between MapReduce and Yarn in the part straggler?
  is Yarn suffer from straggler problem?<br>
  and when MRmaster asks resource manger for resources , resource manger will give MRmaster all resources it needs or it is according to cluster computing capabilities ?<br>
  thanks so much,,</p>