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https://issues.apache.org/jira/browse/SPARK-1503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597195#comment-14597195
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Joseph K. Bradley commented on SPARK-1503:
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Thanks! [~lewuathe] I probably should have looked into this more carefully
before your PR. It would be good to understand the best criterion.
Regardless, I believe most of your PR's changes should carry over.
[~staple] [~mengxr] Do you know what the basis of the TFOCS stopping
criterion is? I don't see that detail described in the paper.
Barring a better understanding...I guess I'd vote to mimic TFOCS.
> Implement Nesterov's accelerated first-order method
> ---------------------------------------------------
>
> Key: SPARK-1503
> URL: https://issues.apache.org/jira/browse/SPARK-1503
> Project: Spark
> Issue Type: New Feature
> Components: MLlib
> Reporter: Xiangrui Meng
> Assignee: Aaron Staple
> Attachments: linear.png, linear_l1.png, logistic.png, logistic_l2.png
>
>
> Nesterov's accelerated first-order method is a drop-in replacement for
> steepest descent but it converges much faster. We should implement this
> method and compare its performance with existing algorithms, including SGD
> and L-BFGS.
> TFOCS (http://cvxr.com/tfocs/) is a reference implementation of Nesterov's
> method and its variants on composite objectives.
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