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https://issues.apache.org/jira/browse/SPARK-7770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725013#comment-14725013
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Apache Spark commented on SPARK-7770:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/8549
> Should GBT validationTol be relative tolerance?
> -----------------------------------------------
>
> Key: SPARK-7770
> URL: https://issues.apache.org/jira/browse/SPARK-7770
> Project: Spark
> Issue Type: Improvement
> Components: ML, MLlib
> Reporter: Joseph K. Bradley
> Priority: Minor
>
> In spark.mllib, GBT validationTol uses absolute tolerance. Relative
> tolerance is arguably easier to set in a meaningful way. Questions:
> * Should we change spark.mllib's validationTol meaning?
> * Should we use relative tolerance in spark.ml's GBT (once we add validation
> support)?
> I would vote for changing both to relative tolerance, where the tolerance is
> relative to the current loss on the training set.
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