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From "Eli Collins (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2732) Add support for the standby in the bin scripts
Date Fri, 30 Dec 2011 03:53:31 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins resolved HDFS-2732.
-------------------------------

    Resolution: Won't Fix
    
> Add support for the standby in the bin scripts
> ----------------------------------------------
>
>                 Key: HDFS-2732
>                 URL: https://issues.apache.org/jira/browse/HDFS-2732
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>
> We need to update the bin scripts to support SBNs. Two ideas:
> Modify start-dfs.sh to start another copy of the NN if HA is configured. We could introduce
a file similar to masters (2NN hosts) called standbys which lists the SBN hosts, and start-dfs.sh
would automatically make the NN it starts active (and leave the NNs listed in standby as is).
> Or simpler, we could just provide a start-namenode.sh script that a user can run to start
the SBN on another host themselves. The user would manually tell the other NN to be active
via HAAdmin (or start-dfs.sh could do that automatically, ie assume the NN it starts should
be the primary).

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