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https://issues.apache.org/jira/browse/SPARK-11136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15052718#comment-15052718
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Xusen Yin commented on SPARK-11136:
-----------------------------------
I add a [design
doc|https://docs.google.com/document/d/1LSRQDXOepVsOsCRT_PFwuiS9qmbgCzEskVPKXdqHoX0/edit?usp=sharing]
here so that we can talk about different implementations easily.
> Warm-start support for ML estimator
> -----------------------------------
>
> Key: SPARK-11136
> URL: https://issues.apache.org/jira/browse/SPARK-11136
> Project: Spark
> Issue Type: Sub-task
> Components: ML
> Reporter: Xusen Yin
> Priority: Minor
>
> The current implementation of Estimator does not support warm-start fitting,
> i.e. estimator.fit(data, params, partialModel). But first we need to add
> warm-start for all ML estimators. This is an umbrella JIRA to add support for
> the warm-start estimator.
> Treat model as a special parameter, passing it through ParamMap. e.g. val
> partialModel: Param[Option[M]] = new Param(...). In the case of model
> existing, we use it to warm-start, else we start the training process from
> the beginning.
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