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From "Zhihong Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2698) BackupNode is downloading image from NameNode for every checkpoint
Date Wed, 21 Dec 2011 23:21:30 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174483#comment-13174483

Zhihong Yu commented on HDFS-2698:

Patch looks good to me.
> BackupNode is downloading image from NameNode for every checkpoint
> ------------------------------------------------------------------
>                 Key: HDFS-2698
>                 URL: https://issues.apache.org/jira/browse/HDFS-2698
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>         Attachments: rollFSImage.patch, rollFSImage.patch
> BackupNode can make periodic checkpoints without downloading image and edits files from
the NameNode, but with just saving the namespace to local disks. This is not happening because
NN renews checkpoint time after every checkpoint, thus making its image ahead of the BN's
even though they are in sync.

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