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https://issues.apache.org/jira/browse/HUDI-538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17019243#comment-17019243
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vinoyang commented on HUDI-538:
-------------------------------

[~vinoth] Agree on both two core issues. About the second issue, especially on 
this sentence:

bq. We need a way to do these lazily by pushing the key extraction function 
into the entire writing path.

Do you mean the logic in the {{DeltaSync#readFromSource}}? A little bit more 
specific, do you mean {{KeyGenerator}}?



> Restructuring hudi client module for multi engine support
> ---------------------------------------------------------
>
>                 Key: HUDI-538
>                 URL: https://issues.apache.org/jira/browse/HUDI-538
>             Project: Apache Hudi (incubating)
>          Issue Type: Wish
>          Components: Code Cleanup
>            Reporter: vinoyang
>            Priority: Major
>
> Hudi is currently tightly coupled with the Spark framework. It caused the 
> integration with other computing engine more difficult. We plan to decouple 
> it with Spark. This umbrella issue used to track this work.
> Some thoughts wrote here: 
> https://docs.google.com/document/d/1Q9w_4K6xzGbUrtTS0gAlzNYOmRXjzNUdbbe0q59PX9w/edit?usp=sharing
> The feature branch is {{restructure-hudi-client}}.



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