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https://issues.apache.org/jira/browse/HDFS-4508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daisuke Kobayashi reassigned HDFS-4508:
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Assignee: Daisuke Kobayashi
> Two minor improvements to the QJM Deployment docs
> -------------------------------------------------
>
> Key: HDFS-4508
> URL: https://issues.apache.org/jira/browse/HDFS-4508
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: documentation
> Affects Versions: 2.0.3-alpha
> Reporter: Harsh J
> Assignee: Daisuke Kobayashi
> Priority: Minor
>
> Suggested by ML user Azurry, the docs at
> http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/HDFSHighAvailabilityWithQJM.html#Deployment_details
> can be improved for two specific lines:
> {quote}
> * If you have already formatted the NameNode, or are converting a
> non-HA-enabled cluster to be HA-enabled, you should now copy over the
> contents of your NameNode metadata directories to the other, unformatted
> NameNode by running the command "hdfs namenode -bootstrapStandby" on the
> unformatted NameNode. Running this command will also ensure that the
> JournalNodes (as configured by dfs.namenode.shared.edits.dir) contain
> sufficient edits transactions to be able to start both NameNodes.
> * If you are converting a non-HA NameNode to be HA, you should run the
> command "hdfs -initializeSharedEdits", which will initialize the JournalNodes
> with the edits data from the local NameNode edits directories.
> {quote}
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