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https://issues.apache.org/jira/browse/CASSANDRA-7550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14061974#comment-14061974
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Hanson commented on CASSANDRA-7550:
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I mean that record is newly inserted and has not been flushed into SSTable yet,
only existed in memory at the moment to be deleted. So it shall be safety to do
the Delete in memory without putting a tombstone.
In our use case, the records only stay in DB for hours (random duration) and
will then be deleted.
> Reduce tombstones
> -----------------
>
> Key: CASSANDRA-7550
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7550
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Hanson
>
> If a record is still in Memtable, the Delete to that record shall be done in
> memory (Make Compaction in memory), instead of placing a tombstone. This way
> it can save disk I/O and space a lot for records with short lifecycle.
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