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https://issues.apache.org/jira/browse/TAJO-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14084883#comment-14084883
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ASF GitHub Bot commented on TAJO-704:
-------------------------------------
Github user blrunner commented on the pull request:
https://github.com/apache/tajo/pull/77#issuecomment-51086877
I implemented the HA admin tool, you can use it as follows:
- $TAJO_HOME/bin/tajo haadmin -formatHA
- $TAJO_HOME/bin/tajo haadmin -transitionToActive <target
tajo.master.umbilical-rpc.address>
- $TAJO_HOME/bin/tajo haadmin -transitionToBackup <target
tajo.master.umbilical-rpc.address>
- $TAJO_HOME/bin/tajo haadmin -getState <target
tajo.master.umbilical-rpc.address>
* Note
If you want to format HA state, you have to shutdown your tajo cluster
before formatting.
> TajoMaster HA
> -------------
>
> Key: TAJO-704
> URL: https://issues.apache.org/jira/browse/TAJO-704
> Project: Tajo
> Issue Type: New Feature
> Components: tajo master
> Affects Versions: 0.9.0
> Reporter: Jaehwa Jung
> Assignee: Jaehwa Jung
> Fix For: 0.9.0
>
> 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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