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Posted to common-dev@hadoop.apache.org by "Ravi Gummadi (JIRA)" <ji...@apache.org> on 2009/06/19 07:29:07 UTC

[jira] Updated: (HADOOP-6087) distcp can support bandwidth limiting

     [ https://issues.apache.org/jira/browse/HADOOP-6087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Gummadi updated HADOOP-6087:
---------------------------------

    Attachment: d_bw.patch

Attaching patch that supports the option  -bwlimit <bandwidthInBytesPerSec>.

A separate thread in each map monitors the bandwidth by perodically calculating the available bandwidth for this map and sets sleeptime for the copy-thread. copy-thread sleeps for that amount of time and starts copying again.
distcp.bandwidth.limit  is the config property equivalent to -bwlimit option.
distcp.bandwidth.monitor.interval(with default value of 60000millisec) is the period for the bandwidth monitor thread to execute periodically and set the sleeptime.

Please review and provide your comments.

> distcp can support bandwidth limiting
> -------------------------------------
>
>                 Key: HADOOP-6087
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6087
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: tools/distcp
>    Affects Versions: 0.21.0
>            Reporter: Ravi Gummadi
>            Assignee: Ravi Gummadi
>             Fix For: 0.21.0
>
>         Attachments: d_bw.patch
>
>
> distcp should support an option for user to specify the bandwidth limit for the distcp job.

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