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https://issues.apache.org/jira/browse/HDFS-16201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17420439#comment-17420439
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Yuanbo Liu commented on HDFS-16201:
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[~ayushtkn] Thanks for your comments, I'll update my patch later
> Select datanode based on storage type
> -------------------------------------
>
> Key: HDFS-16201
> URL: https://issues.apache.org/jira/browse/HDFS-16201
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Yuanbo Liu
> Assignee: Yuanbo Liu
> Priority: Major
> Attachments: HDFS-16201-001.patch
>
>
> Since storage policy was introduced into hdfs, it would be useful if hdfs
> client could choose datanode of replica based on storage type priority when
> reading. The priority should be RAM_DISK > SSD > DISK > ARCHIVE.
> Here is the process graph
> !https://iwiki.woa.com/download/attachments/979566104/image2021-8-31_20-23-24.png?version=1&modificationDate=1630412605000&api=v2!
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