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Posted to issues@kudu.apache.org by "Grant Henke (JIRA)" <ji...@apache.org> on 2018/02/16 15:21:00 UTC

[jira] [Updated] (KUDU-859) Actively remove data and deltas for deleted columns

     [ https://issues.apache.org/jira/browse/KUDU-859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Grant Henke updated KUDU-859:
-----------------------------
    Target Version/s:   (was: 1.5.0)

> Actively remove data and deltas for deleted columns
> ---------------------------------------------------
>
>                 Key: KUDU-859
>                 URL: https://issues.apache.org/jira/browse/KUDU-859
>             Project: Kudu
>          Issue Type: Improvement
>          Components: tablet
>    Affects Versions: Private Beta
>            Reporter: Todd Lipcon
>            Priority: Major
>
> Currently, we only remove data blocks for deleted columns when we run a compaction. If a table is already fully compacted, this won't happen at all. In most cases, it will happen very slowly.
> We should add some kind of in-the-background operation which removes the CFiles corresponding to deleted columns, and modify the delta compaction code paths to actually drop delta data for deleted columns.



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