2D sqaure blocking for matrix multiplication
--------------------------------------------
Key: HAMA-83
URL: https://issues.apache.org/jira/browse/HAMA-83
Project: Hama
Issue Type: New Feature
Components: implementation
Affects Versions: 0.1.0
Reporter: Edward J. Yoon
Assignee: Edward J. Yoon
Fix For: 0.1.0
The matrix multiplication of the original arrays can be transformed into matrix
multiplication of blocks. For example,
C_block(1,1)=A_block(1,1)*B_block(1,1) + A_block(1,2)*B_block(2,1)
emit <blockKey, subMatrix> pairs instead of current <Int, Vector> input
formatter, and have a reducer sum up the sub matrices as describe below.
{code}
Mapper<BlockKey, subMatrix> {
sub-matrix multiplication of block
}
Reducer<BlockKey, subMatrix> {
summation all sub-matrices
}
{code}
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