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https://issues.apache.org/jira/browse/HDFS-15548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17193079#comment-17193079
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Leon Gao commented on HDFS-15548:
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Yes, I think the common use case will be between DISK and ARCHIVE, as they are
normally on HDDs.
Putting cold blocks on SSD would be a waste so I guess it may not be needed
> Allow configuring DISK/ARCHIVE storage types on same device mount
> -----------------------------------------------------------------
>
> Key: HDFS-15548
> URL: https://issues.apache.org/jira/browse/HDFS-15548
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Leon Gao
> Assignee: Leon Gao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We can allow configuring DISK/ARCHIVE storage types on the same device mount
> on two separate directories.
> Users should be able to configure the capacity for each. Also, the datanode
> usage report should report stats correctly.
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