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Review request for mahout.
Summary
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MAHOUT-922-2: add DistributedCache broadcast to B' files for AB' job and R-hat
files for B' job, on by default, governed by -br option.
Notes: Performance: I did not notice the difference between using distributed
cache vs. opening direct streams, which is understandable since jobs are
cpu-bound.
I did have to add some functionality to multifile sequence file iterators to
allow for specifying multiple files coming from distributed cache which is
neither glob nor directory. I also added fixes for some corner case NPEs there.
Sorry eclipse reformatting for style is a bit different from original Sean's
formatting in Intellij, it is hard to adjust it exactly.
This addresses bug MAHOUT-922.
https://issues.apache.org/jira/browse/MAHOUT-922
Diffs
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Diff: https://reviews.apache.org/r/3265/diff
Testing
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Thanks,
Dmitriy
