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https://issues.apache.org/jira/browse/FLINK-11499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17062459#comment-17062459
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Kostas Kloudas commented on FLINK-11499:
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[~pnowojski] I think it makes sense to have this strategy as a fallback as long
as we clearly document it (with all the caveats).
> Extend StreamingFileSink BulkFormats to support arbitrary roll policies
> -----------------------------------------------------------------------
>
> Key: FLINK-11499
> URL: https://issues.apache.org/jira/browse/FLINK-11499
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / FileSystem
> Reporter: Seth Wiesman
> Priority: Major
> Labels: usability
> Fix For: 1.11.0
>
>
> Currently when using the StreamingFilleSink Bulk-encoding formats can only be
> combined with the `OnCheckpointRollingPolicy`, which rolls the in-progress
> part file on every checkpoint.
> However, many bulk formats such as parquet are most efficient when written as
> large files; this is not possible when frequent checkpointing is enabled.
> Currently the only work-around is to have long checkpoint intervals which is
> not ideal.
>
> The StreamingFileSink should be enhanced to support arbitrary roll policy's
> so users may write large bulk files while retaining frequent checkpoints.
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