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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11059) ZK-less region assignment
Date Fri, 25 Apr 2014 15:34:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13981153#comment-13981153
] 

Jimmy Xiang commented on HBASE-11059:
-------------------------------------

I don't have a writeup yet. Currently, I was thinking to make sure region assignment works
without ZK to simplify the state machine, improve the assignment performance, make it more
reliable, so that we can support more regions, and do HA a little bit easier later on. As
to pin some system tables to somewhere, like the active master, it's been done in a different
issue.

For backward compatibility, the ZK part will still be there for a while. Yes, it should be
of some help.

> 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
>
> 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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