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From Sai Sai <saigr...@yahoo.in>
Subject Re: Does a Map task run 3 times on 3 TTs or just once
Date Fri, 12 Apr 2013 08:07:40 GMT
Just wondering if it is right to assume that a Map task is run 3 times on 3 different TTs in
parallel and whoever completes processing the task first that output is picked up and written
to intermediate location.
Or is it true that a map task even though its data is replicated 3 times will run only once
and other 2 will be on the stand by just incase this fails the second one will run followed
by 3rd one if the 2nd Mapper fails.
Plesae pour some light.
Thanks
Sai
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