Hi Vikas,
> 1:- How to format output from reduce( like default is tab separator can we
> make it "," separator)
If you want this behaviour for all your Hadoop jobs, you have to put this into
your mapred-site.xml:
<property>
<name>mapred.textoutputformat.separator</name>
<value>,</value>
</property>
(see https://issues.apache.org/jira/browse/HADOOP-3295)
To change the separator programatically for certain jobs only:
final Configuration conf = getConf();
conf.set(TextOutputFormat.SEPERATOR, ",");
Good Luck :)
Martin
