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https://issues.apache.org/jira/browse/HDFS-7228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14167321#comment-14167321
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Jing Zhao commented on HDFS-7228:
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BTW, we will allow admins to define new policies in the future, and the
corresponding jira is HDFS-7076.
> Add an SSD policy into the default BlockStoragePolicySuite
> ----------------------------------------------------------
>
> Key: HDFS-7228
> URL: https://issues.apache.org/jira/browse/HDFS-7228
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.6.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
>
> Currently in the default BlockStoragePolicySuite, we've defined 4 storage
> policies: LAZY_PERSIST, HOT, WARM, and COLD. Since we have already defined
> the SSD storage type, it will be useful to also include a SSD related storage
> policy in the default suite.
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