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From "Jaehwa Jung (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-704) TajoMaster HA
Date Wed, 02 Apr 2014 02:23:14 GMT

    [ https://issues.apache.org/jira/browse/TAJO-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957262#comment-13957262

Jaehwa Jung commented on TAJO-704:

Hi Alvin!

Thank you for your volunteering! 
Well, just ask if you need help.


> TajoMaster HA
> -------------
>                 Key: TAJO-704
>                 URL: https://issues.apache.org/jira/browse/TAJO-704
>             Project: Tajo
>          Issue Type: Improvement
>          Components: tajo master
>            Reporter: Jaehwa Jung
>            Assignee: Alvin Henrick
>         Attachments: TAJO-704.Henrick.01.patch.txt, TajoMasterHAdraft.pdf
> TajoMaster is a Single Point of Failure in a Tajo Cluster because TajoMaster is the central
controlling entity for all components of the Tajo system. TajoMaster failure prevents clients
from submitting new queries to the cluster, and results in the disruption of the ability to
run insert overwrite queries because the TajoWorker can’t apply its statistical information
to CatalogStore. Therefore, the high-availability (HA) of TajoMaster is essential for the
high-availability of Tajo generally. 

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