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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12975) SplitTranaction, RegionMergeTransaction to should have InterfaceAudience of LimitedPrivate(Coproc,Phoenix)
Date Thu, 05 Feb 2015 18:57:36 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14307767#comment-14307767
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Lars Hofhansl commented on HBASE-12975:
---------------------------------------

[~apurtell], agreed. A 2PC between regions might be better. With SplitTransaction we're almost
there (but the rest will be tricky, I'm afraid). We would need to be able to get all the way
to the PONR, and be able to guarantee that we will be able to finish to the PONR when asked
to commit.

> SplitTranaction, RegionMergeTransaction to should have InterfaceAudience of LimitedPrivate(Coproc,Phoenix)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-12975
>                 URL: https://issues.apache.org/jira/browse/HBASE-12975
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Rajeshbabu Chintaguntla
>            Assignee: Rajeshbabu Chintaguntla
>            Priority: Minor
>             Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.11
>
>         Attachments: HBASE-12975.patch
>
>
> Making SplitTransaction, RegionMergeTransaction limited private is required to support
local indexing feature in Phoenix to ensure regions colocation. 
> We can ensure region split, regions merge in the coprocessors in few method calls without
touching internals like creating zk's, file layout changes or assignments.
> 1) stepsBeforePONR, stepsAfterPONR we can ensure split.
> 2) meta entries can pass through coprocessors to atomically update with the normal split/merge.
> 3) rollback on failure.



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