Examples (the top ones are related to streaming jobs): http://www.infoq.com/articles/HadoopOutputFormat http://research.neustar.biz/2011/08/30/custom-inputoutput-formats-in-hadoop-streaming/ http://stackoverflow.com/questions/12759651/how-to-override-inputformat-and-outputformat-in-hadoop-application
Regards, Shahab On Wed, Sep 10, 2014 at 2:28 PM, Dmitry Sivachenko <trtrmi...@gmail.com> wrote: > > On 10 сент. 2014 г., at 22:19, Rich Haase <rdha...@gmail.com> wrote: > > > You can write a custom output format > > > Any clues how can this can be done? > > > > > , or you can write your mapreduce job in Java and use a NullWritable as > Susheel recommended. > > > > grep (and every other *nix text processing command) I can think of would > not be limited by a trailing tab character. It's even quite easy to strip > away that tab character if you don't want it during the post processing > steps you want to perform with *nix commands. > > > Problem is that the line itself contains a TAB in the middle, there will > not be extra trailing TAB at the end. > So it is not that simple. > You never know if it is a TAB from the original line or it is extra TAB > added by TextOutputFormat. > > Thanks!
