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Copy speed during Reduce

Question asked by impermisha on Oct 1, 2012
Latest reply on Oct 4, 2012 by gera
What speed do people typically see for the copy during a reduce?

From tasktracker here is an average one we see:
reduce > copy (500 of 504 at 1.52 MB/s) >
We have seen it range from .5 to 4 MB/s.  But really not above that.
That seems slow.  Do you guys have common averages you see?

Are there ways to improve that?