sumit ghosh 2013-06-07, 06:42
I am hit by skewed Join, my last reducer is getting same number of Reduce input groups/records.
Reduce input groups 432,446,942
Reduce shuffle bytes 13,012,613,275
Reduce input records 432,446,942
Why is this happening? I have turned on skew join optimization:
Nitin Pawar 2013-06-07, 06:46