Multiple OutPut Format In Hadoop

The MultipleOutputs class simplifies writing data to multiple outputs.

Configure a named output with a name and an OutputFormat .

When writing out a < key ,value > pair, specify the named output to send it to. This is accomplished by assigning names to each output, using the static  addNamedOutput method of MultipleOutputs.  For example:  In Driver Class add following: MultipleOutputs.addNamedOutput(job, "QuantityData", TextOutputFormat.class, NullWritable.class, Text.class); MultipleOutputs.addNamedOutput(job,"loadProfileChannelData",TextOutputFormat.class,NullWritable.class,Text.class); MultipleOutputs.addNamedOutput(job, "registerValueData", TextOutputFormat.class, NullWritable.class, Text.class); In Mapper Class add following: public class MyParserMapper   extends     Mapper<LongWritable, Text, NullWritable, Text> { private MultipleOutputs<NullWritable,Text> outs;    @Override    public void setup(Context context)throws IOException, InterruptedException{   outs = new MultipleOutputs<NullWritable,Text>(context);    }