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Posted to mapreduce-user@hadoop.apache.org by Antonio Paolacci <an...@gmail.com> on 2011/10/23 12:41:39 UTC

Basic claim about numbers of maps and reducers

I read online (I think which refers to the
mapred.tasktracker.map.tasks.maximum and reduce proprerties)* *:
" If you have 1 CPU with 4 cores then setting map to 3 and reduce to 3 would
be good (saving 1 core for the daemon). "
This claim is correct ?
Which are the remarks to do ?

Thank's
antonio paolacci

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