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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5945) Add rolling upgrade information to fsimage
Date Thu, 13 Feb 2014 14:02:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13900350#comment-13900350
] 

Vinayakumar B commented on HDFS-5945:
-------------------------------------

Instead of extracting checking part to {{checkUpgrade()}} can't we use {{nn.getFSImage().isUpgradeFinalized()}}
directly? This will avoid checking disks on RPC calls holding writeLock.


> Add rolling upgrade information to fsimage
> ------------------------------------------
>
>                 Key: HDFS-5945
>                 URL: https://issues.apache.org/jira/browse/HDFS-5945
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h5945_20140213.patch
>
>
> When rolling upgrade is in progress, the standby namenode may create checkpoint.  The
rolling upgrade information should be added to fsimage in order to support namenode restart
and continue rolling upgrade.



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