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https://issues.apache.org/jira/browse/KAFKA-7879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16755585#comment-16755585
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huxihx commented on KAFKA-7879:
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[~bansalp] What's your filesystem?
> Data directory size decreases every few minutes when producer is sending
> large amount of data
> ---------------------------------------------------------------------------------------------
>
> Key: KAFKA-7879
> URL: https://issues.apache.org/jira/browse/KAFKA-7879
> Project: Kafka
> Issue Type: Improvement
> Reporter: Pradeep Bansal
> Priority: Major
>
> I am running kafka broker with 6 nodes and have set reteion hours to 24 hours
> and retention bytes to 5 GB.
>
> I have set retention bytes to 250GB on topic configuration.
>
> Now when producing message in async mode with 1000 bytes message with very
> high frequency. I am seeing that kafka data directory size increases but
> every 5 minutes it decreases by some percentage (in my observation it
> increases by 40G and then reduces to 20G, so in every 5 minutes we are seeing
> increase by 20G instead of 40G).
>
> Is there any extra configuration we need to set to avoid this data loss or is
> there some sort of compression that is going on here.
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