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From "Todd Lipcon (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2185) HA: HDFS portion of ZK-based FailoverController
Date Tue, 03 Apr 2012 01:01:32 GMT

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

Todd Lipcon resolved HDFS-2185.

       Resolution: Fixed
    Fix Version/s: Auto failover (HDFS-3042)
     Hadoop Flags: Reviewed

Committed to auto-failover branch (HDFS-3042). Please feel free to continue commenting on
the design -- either here, or if you prefer, we can move the discussion to the umbrella task
HDFS-3042. Apologies for having uploaded the document to this subtask instead of the supertask.
> 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: auto-failover, ha
>    Affects Versions: 0.24.0, 0.23.3
>            Reporter: Eli Collins
>            Assignee: Todd Lipcon
>             Fix For: Auto failover (HDFS-3042)
>         Attachments: Failover_Controller.jpg, hdfs-2185.txt, hdfs-2185.txt, hdfs-2185.txt,
hdfs-2185.txt, hdfs-2185.txt, zkfc-design.pdf, 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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