hi, Will these class support in hadoop 0.20 version. I am using this only.?
Please suggest. Thanksin advance, Ranjini.R On Mon, Dec 9, 2013 at 12:27 PM, Vinayakumar B <[email protected]>wrote: > Hi Ranjini, > > > > Please check this mapper class whether this suites your needs. > > org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper > > > > Thanks and Regards, > > Vinayakumar B > > *From:* Ranjini Rathinam [mailto:[email protected]] > *Sent:* 09 December 2013 11:13 > *To:* [email protected] > *Subject:* Re: hadoop -Mapreduce > > > > HI, > > > > I need to use thread functionality to run more than one mapper class > parallelly. > > > > Please suggest with some sample code. > > > > Thanks in advance. > > On Fri, Dec 6, 2013 at 4:37 PM, Subroto <[email protected]> wrote: > > Hi Ranjini, > > > > The number of mappers depend on InputSplits and which intern depends on > size of input data. > > The number of reducers can be configured by "mapred.reduce.tasks" > > > > Further you can get more information on numbers of Maps and Reduce for a > Job from: > > http://wiki.apache.org/hadoop/HowManyMapsAndReduces > > > > Running parallel mappers and reducers depends on availability of map and > reduce slots in the cluster. > > > > Cheers, > > Subroto Sanyal > > > > On Dec 6, 2013, at 12:00 PM, Ranjini Rathinam wrote: > > > > HI, > > > > How to run more than one mapper and reduce parallelly.? > > > > Please suggest.Thanks in advance. > > > > Ranjini. > > > > >
