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Hadoop >> mail # user >> Re: simple hadoop psuedo distr. mode instructions


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Re: simple hadoop psuedo distr. mode instructions
great thanks Jagat !

On Fri, Mar 23, 2012 at 1:42 AM, Jagat <[EMAIL PROTECTED]> wrote:

> Hi Jay
>
> Just follow this to install
>
> http://jugnu-life.blogspot.in/2012/03/hadoop-installation-tutorial.html
>
> The official tutorial at link below is also useful
>
> http://hadoop.apache.org/common/docs/r1.0.1/single_node_setup.html
>
> Thanks
>
> Jagat
>
> On Fri, Mar 23, 2012 at 12:08 PM, Jay Vyas <[EMAIL PROTECTED]> wrote:
>
> > 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
> >
>

--
Jay Vyas
MMSB/UCHC