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https://issues.apache.org/jira/browse/HDFS-1162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur resolved HDFS-1162.
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    Resolution: Won't Fix

This has been fixed via various changes to the fsimage/edits file that Hairong 
has done recently... compressing the fsimage, avoid downloading the fsimage 
based on checksums, storing only the last component of the pathname in the 
fsimage, etc.

> Reduce the time required for a checkpoint
> -----------------------------------------
>
>                 Key: HDFS-1162
>                 URL: https://issues.apache.org/jira/browse/HDFS-1162
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>
> The checkpoint time increases linearly with the number of files in the 
> cluster. This is a problem with large clusters.

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