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https://issues.apache.org/jira/browse/FLINK-13850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916071#comment-16916071
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Kostas Kloudas commented on FLINK-13850:
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In general I agree with the idea of making the Config a "first class citizen", 
I am not sure if the name is correct in all cases. Actually the whole 
StreamingFileSink was created in a way so that it offers the minimal 
functionality (but supports it well) and with the intention to add features as 
users ask for it.

For example, I was thinking that for bulk formats, the compression algorithm or 
format specific stuff will go in the there (or to a subclass of the config, 
e.g. BulkFormatConfig). But then, the name partfileconfig may no longer be the 
right name. This is my concern for  "future-proof-ness"

> Refactor part file configuration into a single method
> -----------------------------------------------------
>
>                 Key: FLINK-13850
>                 URL: https://issues.apache.org/jira/browse/FLINK-13850
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Connectors / FileSystem
>            Reporter: Gyula Fora
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.10.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently there is only two methods on both format builders
> withPartFilePrefix and withPartFileSuffix for configuring the part files but 
> in the future it is likely to grow.
>  * More settings, different directories for pending / inprogress files etc
> I suggest we remove these two methods and replace them with a single : 
> withPartFileConfig(..) where we use an extensible config class.
> This should be fixed before 1.10 in order to not release the other methods.



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