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https://issues.apache.org/jira/browse/HDFS-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chao Sun updated HDFS-12975:
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Attachment: HDFS-12975.001.patch
> Changes to the NameNode to support reads from standby
> -----------------------------------------------------
>
> Key: HDFS-12975
> URL: https://issues.apache.org/jira/browse/HDFS-12975
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Konstantin Shvachko
> Assignee: Chao Sun
> Priority: Major
> Attachments: HDFS-12975.000.patch, HDFS-12975.001.patch
>
>
> In order to support reads from standby NameNode needs changes to add Observer
> role, turn off checkpointing and such.
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