It's called Hadoop Streaming because keys and values are streamed in to stdin of the script you specify for Hadoop Streaming and then captured via stdout.
On Wed, Jan 16, 2013 at 1:04 AM, Pedro Sá da Costa <psdc1...@gmail.com>wrote: > So why it's called hadoop streaming, if it doesn't behave like a > streaming application (The reduces don't receive data as long as it is > produced by the map tasks)? > > > On 16 January 2013 05:41, Jeff Bean <jwfb...@cloudera.com> wrote: > > me property. The reduce method is not called until the mappers are done, > and > > the reducers are not scheduled before the threshold set by > > mapred.reduce.slowstart.completed.maps is reached. > > > > > -- > Best regards, >
