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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3520) Add transfer rate logging to TransferFsImage
Date Sat, 09 Jun 2012 00:57:23 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292143#comment-13292143
] 

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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