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From "Edward J. Yoon" <edwardy...@apache.org>
Subject Re: Hama status /
Date Wed, 03 Jun 2009 09:44:53 GMT
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

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