Hi, 2010/12/22 Paweł Łoziński <pawel.lozin...@gmail.com>: > Hi all, > > a quick question: is the config option name > "mapred.reduce.tasks.speculative.execution" valid in hadoop-0.21, or > did it change since 0.20?
It has changed. Those names are now deprecated. New names are (still booleans): mapreduce.map.speculative mapreduce.reduce.speculative There are also three new configurables for speculative execution control: * mapreduce.job.speculative.speculativecap * mapreduce.job.speculative.slowtaskthreshold * mapreduce.job.speculative.slownodethreshold See the defaults' xml for more details on them :) -- Harsh J www.harshj.com
