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https://issues.apache.org/jira/browse/HDFS-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang updated HDFS-1457:
--------------------------------

      Resolution: Fixed
    Release Note: Add a configuration variable 
dfs.image.transfer.bandwidthPerSec to allow the user to specify the amount of 
bandwidth for transferring image and edits. Its default value is 0 indicating 
no throttling.
    Hadoop Flags: [Reviewed]
          Status: Resolved  (was: Patch Available)

I've just committed this. Thanks Lu!

> Limit transmission rate when transfering image between primary and secondary 
> NNs
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-1457
>                 URL: https://issues.apache.org/jira/browse/HDFS-1457
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.22.0
>
>         Attachments: checkpoint-limitandcompress.patch, 
> trunkThrottleImage.patch, trunkThrottleImage1.patch, trunkThrottleImage2.patch
>
>
> If the fsimage is very big. The network is full in a short time when 
> SeconaryNamenode do checkpoint, leading to Jobtracker access Namenode to get 
> relevant file data to fail in job initialization phase. So we limit 
> transmission speed and compress transmission to resolve the problem. 

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