Hi all I am testing the performance of my Hadoop clsuters with Hadoop Default FIFO schedular. But I find a interesting phenomina.
When I submit a series of jobs, some job will be executed earlier even they are submitted late. All jobs are request same amount of blocks. For example: job 1 submit at time 0 job 2 submit at time 1 job 3 submit at time 2 job 4 submit at time 3 job 4 's queue time is smaller than job3's queue time. This disobey the FIFO principle. Any one can give a hint? Thanks Chen
