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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2185) HA: HDFS portion of ZK-based FailoverController
Date Tue, 27 Mar 2012 01:39:25 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-2185:
------------------------------

    Comment: was deleted

(was: -1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12520047/zkfc-design.pdf
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2104//console

This message is automatically generated.)
    
> HA: HDFS portion of ZK-based FailoverController
> -----------------------------------------------
>
>                 Key: HDFS-2185
>                 URL: https://issues.apache.org/jira/browse/HDFS-2185
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: 0.24.0, 0.23.3
>            Reporter: Eli Collins
>            Assignee: Todd Lipcon
>         Attachments: Failover_Controller.jpg, hdfs-2185.txt, hdfs-2185.txt, hdfs-2185.txt,
hdfs-2185.txt, zkfc-design.pdf, zkfc-design.pdf, zkfc-design.tex
>
>
> This jira is for a ZK-based FailoverController daemon. The FailoverController is a separate
daemon from the NN that does the following:
> * Initiates leader election (via ZK) when necessary
> * Performs health monitoring (aka failure detection)
> * Performs fail-over (standby to active and active to standby transitions)
> * Heartbeats to ensure the liveness
> It should have the same/similar interface as the Linux HA RM to aid pluggability.

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