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From "Akira Ajisaka (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13063) Fix the incorrect spelling in markdown file HDFSHighAvailabilityWithQJM.md
Date Thu, 25 Jan 2018 06:29:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16338799#comment-16338799

Akira Ajisaka commented on HDFS-13063:

+1, checking this in.

> Fix the incorrect spelling in markdown file HDFSHighAvailabilityWithQJM.md
> --------------------------------------------------------------------------
>                 Key: HDFS-13063
>                 URL: https://issues.apache.org/jira/browse/HDFS-13063
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: Jianfei Jiang
>            Assignee: Jianfei Jiang
>            Priority: Minor
>         Attachments: HDFS-13063.001.patch
> The word JournalNode in this markdown file is incorrect spelled.
> In order for the Standby node to keep its state synchronized with the Active node, both
nodes communicate with a group of separate daemons called "JournalNodes" (JNs). When any namespace
modification is performed by the Active node, it durably logs a record of the modification
to a majority of these JNs. The Standby node is capable of reading the edits from the JNs,
and is constantly watching them for changes to the edit log. As the Standby Node sees the
edits, it applies them to its own namespace. In the event of a failover, the Standby will
ensure that it has read all of the edits from the {color:#333333}*JounalNodes*{color} before
promoting itself to the Active state. This ensures that the namespace state is fully synchronized
before a failover occurs.

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