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https://issues.apache.org/jira/browse/HDFS-13046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16337003#comment-16337003
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hu xiaodong edited comment on HDFS-13046 at 1/24/18 6:43 AM:
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Or we can consider the load after sorting by distance. After sorting by
distance, if the datanode's load is greater than the average load *
considerLoadFactor, then move the datanode to the end of the list. I submitted
[^HDFS-13046-considerLoadAfterSortBydistance-001.patch],welcome to discuss.
was (Author: xiaodong.hu):
Or we can consider the load after sorting by distance. After sorting by
distance, if the datanode's load is greater than the average load *
considerLoadFactor, then move the datanode to the end of the list. I submitted
HDFS-13046-considerLoadAfterSortBydistance-001.patch,welcome to discuss.
> 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.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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