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Posted to mapreduce-user@hadoop.apache.org by An...@emc.com on 2012/07/30 21:25:35 UTC

What are the basic Hadoop Java Classes?

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.botelho@emc.com

Mobile: 508-813-2026

Re: What are the basic Hadoop Java Classes?

Posted by Arun C Murthy <ac...@hortonworks.com>.

http://hadoop.apache.org/common/docs/r1.0.3/mapred_tutorial.html

Arun

On Jul 30, 2012, at 12:25 PM, <An...@emc.com> <An...@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.botelho@emc.com
> Mobile: 508-813-2026
>  

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/

Re: What are the basic Hadoop Java Classes?

Posted by Dave Beech <da...@paraliatech.com>.

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, <An...@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.botelho@emc.com****
>
> Mobile: 508-813-2026****
>
> ** **
>