[jira] [Updated] (FLINK-23959) FLIP-175: Add GraphBuilder to compose Estimator/Transformer/AlgoOperator from a DAG of stages

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-23959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-23959:
-----------------------------------
    Labels: pull-request-available  (was: )

> FLIP-175: Add GraphBuilder to compose Estimator/Transformer/AlgoOperator from a DAG of stages
> ---------------------------------------------------------------------------------------------
>
>                 Key: FLINK-23959
>                 URL: https://issues.apache.org/jira/browse/FLINK-23959
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Dong Lin
>            Priority: Major
>              Labels: pull-request-available
>
> The FLIP design doc can be found at https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181311363.
> The existing Flink ML library allows users to compose an Estimator/Transformer from a pipeline (i.e. linear sequence) of Estimator/Transformer. Users only need to construct this Pipeline once and generate the corresponding PipelineModel, without having to explicitly construct the fitted PipelineModel as a linear sequence of stages. However, in order to train a DAG of Estimator/Transformer and uses the trained model for inference, users currently need to construct the DAG twice, once for the training logic and once for the inference logic. This experience is inferior to the experience of training and using a chain of Estimator/Transformer. In addition to requiring more work from users, this approach is more error prone because the DAG for the training logic may be inconsistent from the DAG for the inference logic.
> In order to address the issues described above, we propose to add several helper classes that allow users to compose Estimator/Transformer/AlgoOperator from a DAG of Estimator/Transformer/AlgoOperator.



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