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https://issues.apache.org/jira/browse/HDFS-3218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13249641#comment-13249641
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Todd Lipcon commented on HDFS-3218:
-----------------------------------
- I think it would make sense to add a utility function like
{{DFSUtil.getRandomXferAddress(DatanodeID)}}, since you have a lot of
repetition fo the {{DFSUtil.getRandom().nextInt}} stuff. Or even make it a
member function of the DatanodeID?
Otherwise looks good.
> Use multiple remote DN interfaces for block transfer
> ----------------------------------------------------
>
> Key: HDFS-3218
> URL: https://issues.apache.org/jira/browse/HDFS-3218
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs client
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-3218.txt
>
>
> HDFS-3146 and HDFS-3216 expose multiple DN interfaces to the client. In order
> for clients, in aggregate, to use multiple DN interfaces clients should pick
> different interfaces when transferring blocks. Given that we cache client <->
> DN connections the policy of picking a remote interface at random for each
> new connection seems best (vs round robin for example). In the future we
> could make the client congestion aware. We could also establish multiple
> connections between the client and DN and therefore use multiple interfaces
> for a single block transfer. Both of those are out of scope for this jira.
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