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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7857) Sub-region management
Date Fri, 15 Feb 2013 17:23:12 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-7857:
--------------------------

    Description: 
Sub-region provides a light weight management below region level.
Matt Corgan has a nice summary of the relationship between region size and number of regions
on region server:
https://issues.apache.org/jira/browse/HBASE-7667?focusedCommentId=13575024&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13575024

HBASE-7667 proposed stripe compaction. However, to fully achieve fine-grained management,
more components should participate:
* memstore flush should ideally have knowledge about what makes stripe compaction work efficiently
* we need to figure out where to store sub-region boundary information so that components
have easy access. Boundary information should sustain after region moves from one server to
another.

Since HBASE-7667 focuses on compaction aspect, this JIRA discusses sub-region management in
other components so that we better understand the benefits and complexities.

User may want to see how sub-regions are shaped on web UI.

  was:
Sub-region provides a light weight management below region level.
Matt Corgan has a nice summary of the relationship between region size and number of regions
on region server:
https://issues.apache.org/jira/browse/HBASE-7667?focusedCommentId=13575024&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13575024

HBASE-7667 proposed stripe compaction. However, to fully achieve fine-grained management,
more components should participate:
* memstore flush should ideally have knowledge about what makes stripe compaction work efficiently
* we need to figure out where to store sub-region boundary information so that components
have easy access

Since HBASE-7667 focuses on compaction aspect, this JIRA discusses sub-region management in
other components.

User may want to see how sub-regions are shaped on web UI.

    
> Sub-region management
> ---------------------
>
>                 Key: HBASE-7857
>                 URL: https://issues.apache.org/jira/browse/HBASE-7857
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>
> Sub-region provides a light weight management below region level.
> Matt Corgan has a nice summary of the relationship between region size and number of
regions on region server:
> https://issues.apache.org/jira/browse/HBASE-7667?focusedCommentId=13575024&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13575024
> HBASE-7667 proposed stripe compaction. However, to fully achieve fine-grained management,
more components should participate:
> * memstore flush should ideally have knowledge about what makes stripe compaction work
efficiently
> * we need to figure out where to store sub-region boundary information so that components
have easy access. Boundary information should sustain after region moves from one server to
another.
> Since HBASE-7667 focuses on compaction aspect, this JIRA discusses sub-region management
in other components so that we better understand the benefits and complexities.
> User may want to see how sub-regions are shaped on web UI.

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