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https://issues.apache.org/jira/browse/HDFS-3520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292143#comment-13292143
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Todd Lipcon commented on HDFS-3520:
-----------------------------------
Looks good, except I'd use "Util.monotonicNow()" so that the result isn't
thrown off if the clock changes. Also probably want to round the resulting
value to nearest int, no?
> Add transfer rate logging to TransferFsImage
> --------------------------------------------
>
> Key: HDFS-3520
> URL: https://issues.apache.org/jira/browse/HDFS-3520
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 1.2.0, 2.0.0-alpha
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-3520-b1.txt, hdfs-3520.txt
>
>
> Logging the transfer rate for images and edits in TransferFsImage is useful
> for debugging network issues, especially when using
> dfs.datanode.balance.bandwidthPerSec.
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