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From "hu xiaodong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13046) consider load of datanodes when read blocks of file
Date Thu, 08 Feb 2018 07:02:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16356562#comment-16356562
] 

hu xiaodong commented on HDFS-13046:
------------------------------------

hello, [~ajisakaa],

     what do you think?

> consider load of datanodes when read blocks of file
> ---------------------------------------------------
>
>                 Key: HDFS-13046
>                 URL: https://issues.apache.org/jira/browse/HDFS-13046
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: hu xiaodong
>            Assignee: hu xiaodong
>            Priority: Minor
>         Attachments: HDFS-13046-considerLoadAfterSortBydistance-001-sample.patch, HDFS-13046-sample.patch
>
>
> When sorting block locations, we just consider the distance of datanodes. can we consider
the load of datanodes? We can add a configuration such as 'dfs.namenode.reading.considerLoad',
if set to true, then sort the blocklocations by load of the datanodes, otherwise sort by distance.



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