@Praveen
Thanks . I got it .
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JAGANADH G
http://jaganadhg.in
*ILUGCBE*
http://ilugcbe.org.in
Check the `mapreduce.job.reduce.slowstart.completedmaps` parameter. The
reducers cannot start processing the data from the mappers until the all
the map tasks are complete, but the reducers can start fetching the data
from the nodes on which the map tasks have completed.
Praveen
On Thu, Dec 29, 2
By design reduce would start only after all the maps finish. There is
no way for the reduce to begin grouping/merging by key unless all the
maps have finished.
Sent from my iPhone
On Dec 28, 2011, at 8:53 AM, JAGANADH G wrote:
> Hi All,
>
> I wrote a map reduce program to fetch data from MySQL
Hi All,
I wrote a map reduce program to fetch data from MySQL and process the
data(word count).
The program executes successfully . But I noticed that the reduce task
starts after finishing the map task only .
Is there any way to run the map and reduce in parallel.
The program fetches data from M
