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https://issues.apache.org/jira/browse/HDFS-13062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341884#comment-16341884
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Bharat Viswanadham commented on HDFS-13062:
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Hi [~hanishakoneru]
Thanks for review.
# Maintaining all directories in the localDir is as when JournalNode is
started, it will not be knowing which nameservice this journal node belongs to,
until we get some request from namenode like format eg., That is the reason for
maintaining all directories in localDir in Federated setup.
# Regarding JournalStatus, as we are not creating the directory for the
journal, if it is not corresponding to this journalnode, so even if we iterate
through all localDir's, it will not display journalStatus of other JN.
> Provide support for JN to use separate journal disk per namespace
> -----------------------------------------------------------------
>
> Key: HDFS-13062
> URL: https://issues.apache.org/jira/browse/HDFS-13062
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Attachments: HDFS-13062.00.patch, HDFS-13062.01.patch
>
>
> In Federated HA setup, provide support for separate journal disk for each
> namespace.
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