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https://issues.apache.org/jira/browse/CASSANDRA-4897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537296#comment-13537296
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Radim Kolar commented on CASSANDRA-4897:
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You are right in both cases. There needs to be some kind of heuristics when to 
compact bucket with max sized tables. I have to take a look at lucene code, but 
it has way more elaborated tiered compaction (not bucket based).
                
> Allow tiered compaction define max sstable size
> -----------------------------------------------
>
>                 Key: CASSANDRA-4897
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4897
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Radim Kolar
>            Assignee: Radim Kolar
>             Fix For: 1.2.1
>
>         Attachments: cass-maxsize1.txt, cass-maxsize2.txt
>
>
> Lucene is doing same thing. Correctly configured max segment size will 
> recycle old data faster with less diskspace.

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