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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Trivial Update of "Hbase/Matrix" by udanax
Date Sun, 21 Oct 2007 03:20:31 GMT
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The following page has been changed by udanax:
http://wiki.apache.org/lucene-hadoop/Hbase/Matrix

------------------------------------------------------------------------------
  ----
  == HbaseLINA, a Command-line Utilities that help perform the numerical analysis ==
  
- Using Hbase's Row,Column(Qualifier) two dimensional space, we are able to store large sparse
matrix. Also using iterative algorithms like conjugate gradient method on a parallel processing
platform like MapReduce, 
+ Using Hbase's Row,Column(Qualifier) two dimensional space, we are able to store large sparse
matrix. 
+ [[BR]]Also using iterative algorithms like conjugate gradient method on a parallel processing
platform like MapReduce, 
  we should be able to implement '''High Performance''' and '''World's Largest''' Matrix Computations.
  
  The HbaseLINA will be added as sub-shell in [:Hbase/HbaseShell:Hbase Shell].
+ 
+ === Applications ===
+ 
+  * Scientific simulation and modeling 
+   * Matrix-vector/matrix-matrix multiply 
+   * Soving linear systems 
+  * Information retrieval 
+   * Sorting 
+   * Finding eigenvalues and eigenvectors 
+  * Computer graphics and computational geometry 
+   * Matrix multiply 
+   * computing matrix determinate 
  
  === Initial Contributors ===
  
@@ -25, +38 @@

  == Storing and manipulating numeric, sparse matrices on Hbase ==
  
  A Sparse matrix is created by following the creation command with the keyword "Matrix".
- [[BR]]...
+ 
+ NOTE :
+ 
+ {{{
+ difficulties in tuning sparse matrix. 
+  - indirect and irregular, the inefficient data access 
+ 
+ reordering for matrix partitioning (to create dense structure.) 
+  - graph partitionning algorithms ( use hypergraph for non symmetric matrices ) 
+  - TDF ordering 
+ }}}
+ 
+ 
  
  === Hbase Shell Extension ===
  

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