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]<mailto:[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.
