Hi Pedro In simple terms Streaming API is used in hadoop if you have your mapper or reducer is in any language other than java . Say ruby or python.
Regards Bejoy KS Sent from handheld, please excuse typos. -----Original Message----- From: Pedro Costa <[email protected]> Date: Sat, 16 Jun 2012 10:23:20 To: [email protected]<[email protected]> Reply-To: [email protected] Subject: Re: Streaming in mapreduce I still don't get why hadoop streaming is useful. If I have man and reduce functions defined in shell script, like the one below, why should I use Hadoop? cat someInputFile | shellMapper.sh | shellReducer.sh > someOutputFile On 16/06/2012, at 01:21, Ruslan Al-Fakikh <[email protected]> wrote: > Hi Pedro, > > You can find it here > http://wiki.apache.org/hadoop/HadoopStreaming > > Thanks > > On Sat, Jun 16, 2012 at 2:46 AM, Pedro Costa <[email protected]> wrote: >> Hi, >> >> Hadoop mapreduce can be used for streaming. But what is streaming from the >> point of view of mapreduce? For me, streaming are video and audio data. >> >> Why mapreduce supports streaming? >> >> Can anyone give me an example on why to use streaming in mapreduce? >> >> Thanks, >> Pedro
