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https://issues.apache.org/jira/browse/SPARK-20971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043150#comment-16043150
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Shixiong Zhu commented on SPARK-20971:
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FileStreamSource saves the seen files in the disk/HDFS, we can use the similar
way like org.apache.spark.sql.execution.streaming.FileStreamSource.SeenFilesMap
to purge the file entries.
> Purge the metadata log for FileStreamSource
> -------------------------------------------
>
> Key: SPARK-20971
> URL: https://issues.apache.org/jira/browse/SPARK-20971
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 2.1.1
> Reporter: Shixiong Zhu
>
> Currently
> [FileStreamSource.commit|https://github.com/apache/spark/blob/16186cdcbce1a2ec8f839c550e6b571bf5dc2692/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FileStreamSource.scala#L258]
> is empty. We can delete unused metadata logs in this method to reduce the
> size of log files.
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