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From "Zhong Yanghong (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (KYLIN-2731) Introduce checkpoint executable
Date Sun, 03 Dec 2017 12:01:00 GMT

     [ https://issues.apache.org/jira/browse/KYLIN-2731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhong Yanghong resolved KYLIN-2731.
-----------------------------------
    Resolution: Resolved

> Introduce checkpoint executable
> -------------------------------
>
>                 Key: KYLIN-2731
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2731
>             Project: Kylin
>          Issue Type: Sub-task
>    Affects Versions: v2.1.0
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>         Attachments: One-Click Cube Optimization.png
>
>
> The basic idea of cube optimization without influencing current queries is shown at figure
[^One-Click Cube Optimization.png]. 
> To optimize a cube with N ready segments,
> * For each segment, a corresponding optimize job will be triggered to adjust its cuboids.
> * If a optimize job finished, it's resulting segment status should be READY_PENDING and
will not serve query.
> * There should be job to wait for all of the optimize jobs finishing their work, and
then atomically remove old READY segments and update the status of READY_PENDING segments
to READY for serving query. Here, we call this kind of job as {color:#f79232}checkpoint executable{color}.



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