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Hadoop Cluster Configuration

Question asked by saurabh_deshpande on May 1, 2012
Latest reply on May 2, 2012 by Ted Dunning
Hi All -
This one is regarding Hadoop Cluster configuration..
Since every flavour of linux(ubuntu/cent OS/RedHat) comes with its own configurations, data processing speeds, etc..
Lets say we have a 2-node cluster. One node has RedHat linux and another one has CentOS installed.. But since these two operating systems are different in some way like processing blocks of data, etc.. Is there any possibility of getting into **'speculative execution'** every time we start execution of MapReduce Job on our 2-node cluster?