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HDFS >> mail # user >> Re: How to write the contents from mapper into file

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Re: How to write the contents from mapper into file
If you have a map only job , then the output of the mappers would be
written by hadoop itself.

On Wed, Nov 13, 2013 at 9:50 AM, Sahil Agarwal <[EMAIL PROTECTED]>wrote:

>   I’m not sure if it’s best way, but if all you’re looking for is the
> contents produced from the mapper, you could have a reducer function that
> just returns the data from the mapper unmodified.
>  -Sahil
>   From: unmesha sreeveni <[EMAIL PROTECTED]>
> Date: Tuesday, November 12, 2013 at 9:51 PM
> To: User Hadoop <[EMAIL PROTECTED]>
> Subject: How to write the contents from mapper into file
>   How to write the contents of mapper into file. Is this fine.
>  If my inputfile is splited whether my blw code works?
>  In reducer i am combining this data.
>  public class MyMapper extends
> Mapper<Object, Text, Text, MatrixWritable > {
> public void map(Object key, Text value, Context context)
>  throws IOException, InterruptedException {
>   Configuration conf = new Configuration();
>   FileSystem fs = FileSystem.get(conf);
>   Path inputfile = new Path("in/map");
>   BufferedWriter getdatabuffer = new BufferedWriter(new
> OutputStreamWriter(fs.create(inputfile)));
>   if(value.toString()!= null){
>      getdatabuffer.write(value.toString());
>     }
>     getdatabuffer.close();
>  --
> *Thanks & Regards*
>  Unmesha Sreeveni U.B
> *Junior Developer *
>    ---------------------------------------------------------------------------------
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