How to reduce total shuffle time

[Gaurav Dasgupta]

Hi,

I have run some large and small jobs and calculated the Total Shuffle Time
for the jobs. I can see that the Total Shuffle Time is almost half the
Total Time which was taken by the full job to complete.

My question, here, is that how can we decrease the Total Shuffle Time? And
doing so, what will be its effect on the Job?

Thanks,
Gaurav Dasgupta