Hi Edward,
I had a look to the benchmarks ...
Well a 5000 dense matrix multiply is roughly 30 seconds on my laptop. I have
been doing outofcore parallel matrix factor on solve with dense systems up
to 350000
so I guess this is at least probably for larger matrix that Hama could be
interesting
Do you plan to do such tests with really huge matrices ?
Otherwise what is your business case ?
Cheers
Guillaume
On Wed, Jun 3, 2009 at 6:14 PM, Edward J. Yoon <edwardyoon@apache.org>wrote:
> FYI, I ran some benchmarks 
> http://wiki.apache.org/hama/PerformanceEvaluation
>
> If you need any help, Pls let us know.
>
> Thanks.
>
> On Wed, Jun 3, 2009 at 6:55 PM, tog <guillaume.alleon@gmail.com> wrote:
> > 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, matrixmatrix 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
> >
>
>
>
> 
> 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
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