On Fri, Jul 4, 2014 at 10:59 AM, Chhaya Vishwakarma < chhaya.vishwaka...@lntinfotech.com> wrote:
> Hi, > > > > If have two map tasks running on one node , i have written combiner class > also. > > Will combiner be called once for each map task or just once for both the > map tasks > > > > Can i write a logic inside map which will work as combiner ? if yes will > there be any side effect? > > > > > Hi Chaya, Refer the following URLS http://java.dzone.com/articles/designing-mapreduce-algorithms http://isaacslavitt.com/2014/01/01/in-mapper-combiner-pattern-for-mapreduce/ http://alpinenow.com/blog/in-mapper-combiner/ Best regards -- ********************************** JAGANADH G http://jaganadhg.in *ILUGCBE* http://ilugcbe.org.in
