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https://issues.apache.org/jira/browse/HDFS-2698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176857#comment-13176857
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Hudson commented on HDFS-2698:
------------------------------
Integrated in Hadoop-Hdfs-22-branch #123 (See
[https://builds.apache.org/job/Hadoop-Hdfs-22-branch/123/])
HDFS-2698. BackupNode is downloading image from NameNode for every
checkpoint. Contributed by Konstantin Shvachko.
shv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1225340
Files :
* /hadoop/common/branches/branch-0.22/hdfs/CHANGES.txt
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestBackupNode.java
> 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
> Fix For: 0.22.1
>
> 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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