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https://issues.apache.org/jira/browse/KUDU-2824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingchun Lai resolved KUDU-2824.
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Resolution: Fixed
> Make some tables in high priority in MM compaction
> --------------------------------------------------
>
> Key: KUDU-2824
> URL: https://issues.apache.org/jira/browse/KUDU-2824
> Project: Kudu
> Issue Type: Improvement
> Components: tserver
> Affects Versions: 1.9.0
> Reporter: Yingchun Lai
> Assignee: Yingchun Lai
> Priority: Minor
> Labels: MM, compaction, maintenance, priority
> Fix For: 1.10.0
>
>
> In a Kudu cluster with thousands of tables, it's hard for a specified
> tablet's maintenance OPs to be launched when their scores are not the
> highest, even if the table the tablet belongs to is high priority for Kudu
> users.
> For example, table A has 10 tablets and has total size of 1G, table B has
> 1000 tablets and has total size of 100G. Both of them have similar update
> writes, i.e. DRSs have similar overlaps, similar redo/undo logs, so they have
> similar compaction scores. However, table A has much more reads than table B,
> but table A and B are equal in MM, their DRS compactions are lauched equally,
> we have to suffer a long time util most of tablets have been compacted in the
> cluster to achieve a fast scan.
> So, maybe we can introduce some algorithm to detect high priority tables and
> speed up compaction of these tables?
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