Mapper, Reducer, Configuration, Job / JobConf and Tool. All pretty essential. Plus InputFormats and OutputFormats, FileSystem and Path. Don't forget Partitioners and Comparators.
Hope that helps! On 30 July 2012 20:25, <andrew.bote...@emc.com> wrote: > Could someone give me a list of the basic Java classes that are needed to > run a program in Hadoop? By basic classes I mean classes like Mapper and > Reducer that are essential in running programs in Hadoop. **** > > ** ** > > Thanks,**** > > ** ** > > *Andrew Botelho* > > EMC Corporation**** > > 55 Constitution Blvd., Franklin, MA**** > > andrew.bote...@emc.com**** > > Mobile: 508-813-2026**** > > ** ** >
