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https://issues.apache.org/jira/browse/PIO-51?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836978#comment-15836978
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Pat Ferrel commented on PIO-51:
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[~chanlee514] Is this needed since we are not using the path-to-dir?
> Enable `pio build/train/deploy` outside of engine directory
> -----------------------------------------------------------
>
> Key: PIO-51
> URL: https://issues.apache.org/jira/browse/PIO-51
> Project: PredictionIO
> Issue Type: Improvement
> Reporter: Chan
>
> Users can now provide the engine directory path as —engine-dir or -ed, and
> call `pio build/train/deploy` from anywhere.
> The “engineVersion” used to identify a prediction engine is created using the
> hash of the engine directory path. As a result, the filepath of the engine
> had to be kept the same in a distributed setup, with multiple machines using
> the same trained model. This was a point of confusion for some users, which
> led to this change.
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