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https://issues.apache.org/jira/browse/MAHOUT-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15474144#comment-15474144
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Andrew Palumbo edited comment on MAHOUT-1873 at 9/8/16 9:41 PM:
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Spark {{ABt}} is a candidate:
https://github.com/apache/mahout/blob/master/spark/src/main/scala/org/apache/mahout/sparkbindings/blas/ABt.scala#L296
Currently the accumulator in the combiner is a Default {{SparseRowMatrix}}.
was (Author: andrew_palumbo):
Spark {{AtB}} is a candidate:
https://github.com/apache/mahout/blob/master/spark/src/main/scala/org/apache/mahout/sparkbindings/blas/ABt.scala#L296
Currently the accumulator in the combiner is a Default {{SparseRowMatrix}}.
> Use densityAnalysis() in all necessary operations
> -------------------------------------------------
>
> Key: MAHOUT-1873
> URL: https://issues.apache.org/jira/browse/MAHOUT-1873
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.12.2
> Reporter: Andrew Palumbo
> Assignee: Andrew Palumbo
> Fix For: 0.13.0
>
>
> Find all places in which {{densityAnalysis(...)}} can be used to determine
> ideal matrix structure and implement it. Eg in {{ABt}}, {{AtB}}, and
> possibly Kryo serializers. Ensure when doing this that it is not redundant;
> Ie. the call is not made by both the Kryo serializer and the distributed
> operation.
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