[jira] [Assigned] (KUDU-1625) Schedule compaction on rowsets with high percentage of deleted data

["Alexey Serbin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-1625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Serbin reassigned KUDU-1625:
-----------------------------------

    Assignee:     (was: William Berkeley)

> Schedule compaction on rowsets with high percentage of deleted data
> -------------------------------------------------------------------
>
>                 Key: KUDU-1625
>                 URL: https://issues.apache.org/jira/browse/KUDU-1625
>             Project: Kudu
>          Issue Type: Improvement
>          Components: tablet
>    Affects Versions: 1.0.0
>            Reporter: Todd Lipcon
>            Priority: Major
>
> Although with KUDU-236 we can now remove rows that were deleted prior to the ancient history mark, we don't actively schedule compactions based on deleted rows. So, if for example we have a fully compacted table and issue a DELETE for every row, the data size actually does not change, because no compactions are triggered.
> We need some way to notice the fact that the ratio of deletes to rows is high and decide to compact those rowsets.



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