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https://issues.apache.org/jira/browse/MAHOUT-1572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018266#comment-14018266
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ASF GitHub Bot commented on MAHOUT-1572:
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GitHub user dlyubimov opened a pull request:
https://github.com/apache/mahout/pull/10
MAHOUT-1572 blockify() to detect (naively) the data sparsity in the loaded
data
naive initial fix (?)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dlyubimov/mahout MAHOUT-1572
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/mahout/pull/10.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10
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commit 162c5ca36e00af91a9599075332c577d9b1a13c4
Author: Dmitriy Lyubimov <[email protected]>
Date: 2014-06-04T22:10:11Z
initial fix (?)
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> 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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