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From "Stephen Yuan Jiang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16119) Procedure v2 - Reimplement merge
Date Tue, 17 Jan 2017 07:38:26 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Stephen Yuan Jiang updated HBASE-16119:
    Hadoop Flags: Incompatible change,Reviewed  (was: Reviewed)
    Release Note: 
The merge region logic is controlled by master in 2.0.0 (in 1.x, the core merge region logic
is in the region server side).  The coprocessors related to merge region in RS-side would
be no-op in 2.0.0 and later release.  Therefore, this is an incompatible change.  Users needs
to move the CP logic to new master CP and registers them.

A new mergeRegionsAsync() API is added in client.  The existing mergeRegions() API will call
the new API so client does not have to change its code.  

> Procedure v2 - Reimplement merge
> --------------------------------
>                 Key: HBASE-16119
>                 URL: https://issues.apache.org/jira/browse/HBASE-16119
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2, Region Assignment
>    Affects Versions: 2.0.0
>            Reporter: Matteo Bertozzi
>            Assignee: Stephen Yuan Jiang
>             Fix For: 2.0.0
>         Attachments: HBASE-16119.v1-master.patch, HBASE-16119.v2-master.patch
> use the proc-v2 state machine for merge. also update the logic to have a single meta-writer.

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