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https://issues.apache.org/jira/browse/CASSANDRA-21178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18059213#comment-18059213
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Yifan Cai commented on CASSANDRA-21178:
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The patch looks good.
+1
> Introduce created_at column to system_distributed.compression_dictionaries
> --------------------------------------------------------------------------
>
> Key: CASSANDRA-21178
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21178
> Project: Apache Cassandra
> Issue Type: Task
> Components: Feature/Compression
> Reporter: Stefan Miklosovic
> Assignee: Stefan Miklosovic
> Priority: Normal
> Fix For: 5.x
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Rationale:
> 1) A user does not know when a training occurred so they can not evaluate if
> they shoul train again.
> 2) A user could implement "poor's man auto training" just by croning it.
> 3) At the same time, we do not want to "over train", that is, we do not want
> to allow a user to train, for example, 100 times per minute as that does not
> make any sense. If we introduce created_at column with a timestamp, then we
> could say that not enough time elapsed since the last training and such
> operation would be failed.
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