> This is a kind of newbie question (at least as far as Hadoop is concerned). > I was wondering if they were any Hadoop based project around dealing with > Image indexing and searching ? We are working is this area and might be > interesting to have a look in such a project.
There is a text-search engine library, called lucene. See also the nutch project. Otherwise, Did you mean something like content-based image indexing and searching usig image attributes, such as, color, texture, and etc., not the text of image tag? > Second question is dealing with scientific computing with Haddop. Does > anyone has try to use Hadoop to parallelize a scientific application ? I > know there is Hama but it does not seem very active these days (I might be > wrong ;) ) > Some time ago, I heard of an attempt of implementing some MPI implementation > on top of Hadoop , was it really the plan, is there any update ? > Anyway, I would be interested in any paper/fedeback on the performance of > scientific application running on large clusters using Hadoop. I think the MPI programming isn't suitable for the concept of distributed hdfs and map/reduce programming system, since MPI requires the heavy communication among the nodes. FYI, In hama, 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 5:32 PM, tog <guillaume.all...@gmail.com> wrote: > Hi there, > > This is a kind of newbie question (at least as far as Hadoop is concerned). > I was wondering if they were any Hadoop based project around dealing with > Image indexing and searching ? We are working is this area and might be > interesting to have a look in such a project. > Second question is dealing with scientific computing with Haddop. Does > anyone has try to use Hadoop to parallelize a scientific application ? I > know there is Hama but it does not seem very active these days (I might be > wrong ;) ) > Some time ago, I heard of an attempt of implementing some MPI implementation > on top of Hadoop , was it really the plan, is there any update ? > Anyway, I would be interested in any paper/fedeback on the performance of > scientific application running on large clusters using Hadoop. > > Best Regards > Guillaume > -- Best Regards, Edward J. Yoon @ NHN, corp. edwardy...@apache.org http://blog.udanax.org
