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Posted to issues@kudu.apache.org by "ZhangYao (JIRA)" <ji...@apache.org> on 2018/07/16 12:58:00 UTC

[jira] [Closed] (KUDU-2503) Support for undo compaction when keeping long history of data.

     [ https://issues.apache.org/jira/browse/KUDU-2503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ZhangYao closed KUDU-2503.
--------------------------
    Resolution: Duplicate

> Support for undo compaction when keeping long history of data.
> --------------------------------------------------------------
>
>                 Key: KUDU-2503
>                 URL: https://issues.apache.org/jira/browse/KUDU-2503
>             Project: Kudu
>          Issue Type: New Feature
>            Reporter: ZhangYao
>            Priority: Major
>
> In some case table will update frequently, but we want to keep long history of data and don't need fine-grained version at the same time. If simply increase the undo gc time, there will be a lot of undo deltas which occupy too much disk space and degrade the scan performance. So we can implement an undo compaction opt to compact undo file in compaction interval we set to offset the negative influence.



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