Dmitriy Lyubimov created MAHOUT-1572:
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Summary: blockify() to detect (naively) the data sparsity in the
loaded data
Key: MAHOUT-1572
URL: https://issues.apache.org/jira/browse/MAHOUT-1572
Project: Mahout
Issue Type: Bug
Reporter: Dmitriy Lyubimov
Fix For: 1.0
per [~ssc]:
.bq a dense matrix is converted into a SparseRowMatrix with dense row vectors
by blockify(), after serialization this becomes a dense matrix in sparse format
(triggering OOMs)!
i guess we can look at first row vector and go on to either DenseMatrix or
SparseRowMatrix
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