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From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15073) Finer grained control over normalization actions for RegionNormalizer
Date Wed, 06 Jan 2016 20:37:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086239#comment-15086239
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Mikhail Antonov commented on HBASE-15073:
-----------------------------------------

I think user who may access this API is already supposed to be advanced enough to know about
split / merge normalization (provided there's javadoc for that). I don't think we should have
2 method for essentially the same thing, one for "less" advanced, one for "more" advanced
user?

> Finer grained control over normalization actions for RegionNormalizer
> ---------------------------------------------------------------------
>
>                 Key: HBASE-15073
>                 URL: https://issues.apache.org/jira/browse/HBASE-15073
>             Project: HBase
>          Issue Type: Task
>          Components: regionserver
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: 15073-v1.txt, 15073-v2.txt, 15073-v2.txt, 15073-v3.txt, 15073-v4.txt
>
>
> Currently both region split and merge actions are carried out during normalization for
underlying table.
> However, for certain use case(s), it would be desirable to perform only one type of action.
> There is one boolean flag, keyed by NORMALIZATION_ENABLED_KEY, per table that enables
normalization.
> To provide finer grained control, we have several options:
> 1. introduce another per table flag to indicate which type(s) of actions are allowed
("N" for disabled, "S" for split only, "M" for merge only and "MS" for both split and merge)
> 2. introduce another global flag to indicate which type(s) of actions are allowed
> 3. modify the meaning of existing flag keyed by NORMALIZATION_ENABLED_KEY so that it
indicates type(s) of actions



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