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From "SreeHari (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2007) Backupnode downloading image/edits from Namenode at every checkpoint ..
Date Tue, 20 Dec 2011 05:13:30 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

SreeHari resolved HDFS-2007.
----------------------------

    Resolution: Duplicate
    
> Backupnode downloading image/edits from Namenode at every checkpoint .. 
> ------------------------------------------------------------------------
>
>                 Key: HDFS-2007
>                 URL: https://issues.apache.org/jira/browse/HDFS-2007
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>            Reporter: SreeHari
>            Assignee: SreeHari
>            Priority: Minor
>
> After the fix for HDFS-903 ( md5 verification of fsimage ) , Backupnode is downloading
the image & edit files from namenode everytime since the difference in checkpoint time
is always maintined b/w Namenode and  Backupnode . 
> This happens since Namenode is resetting its checkpoint time after every checkpoint since
we are ignoring renewCheckpointTime and passing true explicitly to rollFsimage during endcheckpoint
, while Backupnode is setting its checkpointtime to whatever it got from the namenode during
startcheckpoint()
> Thus , checkpointtimes will be different during the next checkpoint and ll cause the
image to be downloaded again .. 

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