Hi guys : What the latest, simplest, best directions to get a tiny, psuedodistributed hadoop setup running on my ubuntu machine ?
On Wed, Mar 21, 2012 at 5:14 PM, <[email protected]> wrote: > Owen, > > Is there interest in reverting hadoop-2399 in 0.23.x ? > > - Milind > > --- > Milind Bhandarkar > Greenplum Labs, EMC > (Disclaimer: Opinions expressed in this email are those of the author, and > do not necessarily represent the views of any organization, past or > present, the author might be affiliated with.) > > > > On 3/19/12 11:20 PM, "Owen O'Malley" <[email protected]> wrote: > > >On Mon, Mar 19, 2012 at 11:05 PM, madhu phatak <[email protected]> > >wrote: > > > >> Hi Owen O'Malley, > >> Thank you for that Instant reply. It's working now. Can you explain me > >> what you mean by "input to reducer is reused" in little detail? > > > > > >Each time the statement "Text value = values.next();" is executed it > >always > >returns the same Text object with the contents of that object changed. > >When > >you add the Text to the list, you are adding a pointer to the same Text > >object. At the end you have 6 copies of the same pointer instead of 6 > >different Text objects. > > > >The reason that I said it is my fault, is because I added the optimization > >that causes it. If you are interested in Hadoop archeology, it was > >HADOOP-2399 that made the change. I also did HADOOP-3522 to improve the > >documentation in the area. > > > >-- Owen > > -- Jay Vyas MMSB/UCHC
