How can I get the spill time of each task?

[Yoonmin Nam]

Hi.

 

I want to get exact time spent to spill a map output into disk.

Especially, the time spent to flush method in MapTask.java

 

It actually easy job when I use a pseudo-distributed mode, but

In real cluster, I tried to use custom counter in MapTask and ReduceTask, it
isn't work.

Also, stdout isn't working.

 

So, I want you ask about above issues.

 

Thanks!