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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7857) Sub-region management
Date Fri, 15 Feb 2013 22:05:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579539#comment-13579539

stack commented on HBASE-7857:

[~ted_yu] Please resolve this issue as invalid until you come up w/ better notion of what
a subregion is in the first place, what its scope is in the second place, and then once this
is done, then you could have an issue on their 'management'.

You do not answer my questions.  Instead you provoke more... this issue is for discussing
what subregions are?  Instead you quote others from another issue on compaction stripes (I
click through to discussion that makes allusion but the notion is fuzzy at best and an analogy
at its most hard -- the jimmy quote).  You end that this issue is about discussing whether
or not subregions make sense when you start w/ adding them to the UI and their management.

This issue does not help.  It confuses.  Please clean it up or close.
> Sub-region management
> ---------------------
>                 Key: HBASE-7857
>                 URL: https://issues.apache.org/jira/browse/HBASE-7857
>             Project: HBase
>          Issue Type: New Feature
>            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
> * 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
> 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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