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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11059) ZK-less region assignment
Date Mon, 09 Jun 2014 18:49:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14025536#comment-14025536
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Jimmy Xiang commented on HBASE-11059:
-------------------------------------

[~jeffreyz], yes, it needs meta/master colocation. This patch makes sure only master updates
the meta.
[~toffer], I also set hbase.bulk.assignment.waittillallassigned to true since I'd like to
get the assignment time only. I didn't change forceSync. So the default value should be used.
The reason we need HBASE-10569 is that the patch talks to the meta region directly in persisting
region state changes. If meta is on a different server, the performance shouldn't be the same.
The new deployment is used in my testing. But the original deployment is still supported,
with some performance hurt of course.

> 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.patch,
zk-less_am.pdf
>
>
> 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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