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From "Dmitriy Lyubimov (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (MAHOUT-376) Implement Map-reduce version of stochastic SVD
Date Tue, 25 Jan 2011 00:57:57 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12986153#action_12986153
] 

Dmitriy Lyubimov edited comment on MAHOUT-376 at 1/24/11 7:57 PM:
------------------------------------------------------------------

This is essentially 'patch available' except it requires 0.21 or CDH3 to compile (new API
which is incomplete in 0.20). Hence i will not be changing the status here -- i guess we can
use this when Mahout switches to new api. 

I will open another issue for backport of this to 0.20.

PS. I guess i did click on 'patch available', didn't I? I did not mean to -- this patch changes
the whole dependency thing for mahout. please roll back the status. My apologies.

      was (Author: dlyubimov2):
    This is essentially 'patch available' except it requires 0.21 or CDH3 to compile (new
API which is incomplete in 0.20). Hence i will not be changing the status here -- i guess
we can use this when Mahout switches to new api. 

I will open another issue for backport of this to 0.20.
  
> Implement Map-reduce version of stochastic SVD
> ----------------------------------------------
>
>                 Key: MAHOUT-376
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-376
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>            Reporter: Ted Dunning
>            Assignee: Ted Dunning
>             Fix For: 0.5
>
>         Attachments: MAHOUT-376.patch, Modified stochastic svd algorithm for mapreduce.pdf,
QR decomposition for Map.pdf, QR decomposition for Map.pdf, QR decomposition for Map.pdf,
sd-bib.bib, sd.pdf, sd.pdf, sd.pdf, sd.pdf, sd.tex, sd.tex, sd.tex, sd.tex, SSVD working notes.pdf,
SSVD working notes.pdf, SSVD working notes.pdf, SSVD working notes.pdf, SSVD working notes.pdf,
ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz,
ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz, ssvd-CDH3-or-0.21.patch.gz,
ssvd-CDH3-or-0.21.patch.gz, ssvd-m1.patch.gz, ssvd-m2.patch.gz, ssvd-m3.patch.gz, Stochastic
SVD using eigensolver trick.pdf
>
>
> See attached pdf for outline of proposed method.
> All comments are welcome.

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