What about sorting . Acutually it is done by MapReduce itself. But if we are giving a csv file as input and trying to sort one/multiple column...Whether the corresponting columns also get reflectted??
eg: foo.csv B,2,3 A,4,6 When we apply sorting to first column:whether the resultent will be A,4,6 B,2,3 A will be mapped to its correct values right? If so what will be context.write() of mapper? On Wed, Jan 8, 2014 at 8:18 PM, Chris Mawata <[email protected]> wrote: > Yes. > Check out, for example, > http://packtlib.packtpub.com/library/hadoop-mapreduce-cookbook/ch06lvl1sec66# > > > > On 1/8/2014 2:41 AM, unmesha sreeveni wrote: > > Can we do aggregation with in Hadoop MR > like find min,max,sum,avg of a column in a csv file. > > -- > *Thanks & Regards* > > Unmesha Sreeveni U.B > Junior Developer > > http://www.unmeshasreeveni.blogspot.in/ > > > > -- *Thanks & Regards* Unmesha Sreeveni U.B Junior Developer http://www.unmeshasreeveni.blogspot.in/
