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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5487) Generic framework for Master-coordinated tasks
Date Fri, 21 Dec 2012 01:02:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537584#comment-13537584
] 

Nick Dimiduk commented on HBASE-5487:
-------------------------------------

[~yuzhihong@gmail.com]
bq. Please specify hbase for the Groups.

I intentionally omitted the HBase group because this is not a real patch ready for real review.
I simply want feedback from the people directly interested here. It's really a hack to bold
the accumulo code into HMaster; I would -1 it :p

bq. conf/accumulo-site.xml seems to be empty. Did you want to put anything there ?

Oops, that was a local symlink. It will run w/o the site.xml file, it just logs a warning.
I'll address this in my next patch.
                
> Generic framework for Master-coordinated tasks
> ----------------------------------------------
>
>                 Key: HBASE-5487
>                 URL: https://issues.apache.org/jira/browse/HBASE-5487
>             Project: HBase
>          Issue Type: New Feature
>          Components: master, regionserver, Zookeeper
>    Affects Versions: 0.94.0
>            Reporter: Mubarak Seyed
>            Assignee: Nick Dimiduk
>
> Need a framework to execute master-coordinated tasks in a fault-tolerant manner. 
> Master-coordinated tasks such as online-scheme change and delete-range (deleting region(s)
based on start/end key) can make use of this framework.
> The advantages of framework are
> 1. Eliminate repeated code in Master, ZooKeeper tracker and Region-server for master-coordinated
tasks
> 2. Ability to abstract the common functions across Master -> ZK and RS -> ZK
> 3. Easy to plugin new master-coordinated tasks without adding code to core components

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