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From tog <guillaume.all...@gmail.com>
Subject Re: Hama status /
Date Wed, 03 Jun 2009 09:55:56 GMT
Yes I understand the difference between MPI and Hadoop - I have been using
MPI before it actually exists :)
But as you phrased it, I had the impression that Hama was working on a 1
node/core cluster !!

Regards
Guillaume

On Wed, Jun 3, 2009 at 5:44 PM, Edward J. Yoon <edwardyoon@apache.org>wrote:

> Hi,
>
> There is some difference between Map/Reduce and MPI programming. MPI
> is based on and designed for fast parallel computing using network
> communication on small cluster. Since MPI requires network
> communication, Increased node numbers, there is a linear increase of
> network cost at same time. On the contrary, Map/Reduce is designed to
> distributed processing by connecting many commodity computers
> together. Therefore, The algorithms should avoid large amounts of
> communication for best performance and that key is the 'sequential
> process'.
>
> Thanks.
>
> On Wed, Jun 3, 2009 at 6:07 PM, tog <guillaume.alleon@gmail.com> wrote:
> > Hi Edward
> >
> > I have a test to do which is basically Sparce Mat Vec multiplication and
> Mat
> > norm computation. So that should be possible with Hama in its current
> state
> > I guess.
> > What do you mean by "sequentially executed"
> >
> > Cheers
> > Guillaume
> >
> > On Wed, Jun 3, 2009 at 5:00 PM, Edward J. Yoon <edwardyoon@apache.org
> >wrote:
> >
> >> Hi,
> >>
> >> Currently, the basic matrix operations are implemented based on the
> >> map/reduce programming model. For example, the matrix get/set methods,
> >> the matrix norms, matrix-matrix multiplication/addition, matrix
> >> transpose. In near future, SVD, Eigenvalue decomposition and some
> >> graph algorithms will be implemented. All the operations are
> >> sequentially executed.
> >>
> >> Thanks.
> >>
> >> On Wed, Jun 3, 2009 at 5:45 PM, tog <guillaume.alleon@gmail.com> wrote:
> >> >
> >> > Hi,
> >> >
> >> > I would like to know what is the status of Hama ?
> >> > What am I able to do with it ?
> >> > What are the future directions ?
> >> >
> >> > Cheers
> >> > Guillaume
> >>
> >>
> >>
> >> --
> >> Best Regards, Edward J. Yoon @ NHN, corp.
> >> edwardyoon@apache.org
> >> http://blog.udanax.org
> >>
> >
> >
> >
> > --
> >
> > PGP KeyID: 1024D/47172155
> > FingerPrint: C739 8B3C 5ABF 127F CCFA  5835 F673 370B 4717 2155
> >
> > http://cheztog.blogspot.com
> >
>
>
>
> --
> Best Regards, Edward J. Yoon @ NHN, corp.
> edwardyoon@apache.org
> http://blog.udanax.org
>



-- 

PGP KeyID: 1024D/47172155
FingerPrint: C739 8B3C 5ABF 127F CCFA  5835 F673 370B 4717 2155

http://cheztog.blogspot.com

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