[jira] [Updated] (CASSANDRA-4234) Add tombstone-removal compaction to LCS

["Yuki Morishita (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-4234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yuki Morishita updated CASSANDRA-4234:
--------------------------------------

    Attachment: 4234.txt

Attaching patch to enable tombstone removal on leveled compaction with unit test. (or see https://github.com/yukim/cassandra/commits/4234)
Logic is basically the same as size-tiered. We don't want to promote level of compacted sstable after tombstone removal compaction(otherwise may cause AIOOB exception), so I added new compaction OperationType.TOMBSTONE_COMPACTION to prevent promotion.
                
> Add tombstone-removal compaction to LCS
> ---------------------------------------
>
>                 Key: CASSANDRA-4234
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4234
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 1.2
>            Reporter: Jonathan Ellis
>            Assignee: Yuki Morishita
>            Priority: Minor
>              Labels: compaction
>             Fix For: 1.2
>
>         Attachments: 4234.txt
>
>
> CASSANDRA-3442 will recompact sstables with high levels of expired tombstones, but only under SCS.

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