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From Apache Wiki <wikidi...@apache.org>
Subject [Hama Wiki] Trivial Update of "Architecture" by udanax
Date Mon, 30 Mar 2009 09:42:48 GMT
Dear Wiki user,

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The following page has been changed by udanax:

  The matrix or network structure that frequently changes should have flexible storage structure
for easy update and indicies that point to the appropriate entry. Also, we need a model that
uses the concept of column-iterative methods.
- Hama use a [http://hadoop.apache.org/hbase/ Hbase] to store the matrices. HBase is an open-source,
distributed, column-oriented store modeled.
+ HBase is an open-source, distributed, column-oriented store modeled as a google bigtable.
Hama uses [http://hadoop.apache.org/hbase/ Hbase] to store the matrices and graph which is
represented mathematically.
  Matrices are basically tables. They are ways of storing numbers and other things. Typical
matrix has rows and columns  which is often called a 2-way matrix because it has two dimensions.
For example, you might have respondents-by-attitudes. Of course, you might collect the same
data on the same people at 5 points in time. In that case, you either have 5 different 2-way
matrices, or you could think of it as a 3-way matrix, that is respondent-by-attitude-by-time.

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