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 <[email protected]>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 <[email protected]> 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 <[email protected] > >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 <[email protected]> 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. > >> [email protected] > >> 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. > [email protected] > http://blog.udanax.org > -- PGP KeyID: 1024D/47172155 FingerPrint: C739 8B3C 5ABF 127F CCFA 5835 F673 370B 4717 2155 http://cheztog.blogspot.com
