The copy rate for the reduces is throttled by the availability of the data from the maps.

If the map data is not available yet, the effective copy rate goes toward 0.


patek tek wrote:
Hello,
I have been running experiments with Hadoop and noticed that
the copy-rate of reducers descreases over time (even though there is the
same
number of mappers generating intermediate data).

Is there any obvious answer to this?

Looking forward to your reply!

patektek

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