[jira] [Commented] (HBASE-11059) ZK-less region assignment

["ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-11059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14090286#comment-14090286 ] 

ramkrishna.s.vasudevan commented on HBASE-11059:
------------------------------------------------

[~jxiang]
The doc suggests that only the master updates the meta.  In the master branch the HMaster itself is am HRS.
In the OpenRegionHandler we still do updateMeta().  So is that done  by the RegionServer or the master?  
{code}
      if (!updateMeta(region) || this.server.isStopped() ||
          this.rsServices.isStopping()) {
        return;
      }
{code}

> ZK-less region assignment
> -------------------------
>
>                 Key: HBASE-11059
>                 URL: https://issues.apache.org/jira/browse/HBASE-11059
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>             Fix For: 0.99.0
>
>         Attachments: hbase-11059.patch, hbase-11059_v2.1.patch, hbase-11059_v2.2.patch, hbase-11059_v2.patch, hbase-11059_v3.0.patch, zk-less_am.pdf, zk-less_assignment.png
>
>
> It seems that most people don't like region assignment with ZK (HBASE-5487), which causes many uncertainties. This jira is to support ZK-less region assignment. We need to make sure this patch doesn't break backward compatibility/rolling upgrade.



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