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https://issues.apache.org/jira/browse/HDFS-9667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao resolved HDFS-9667.
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Resolution: Fixed
> StorageType: SSD precede over DISK
> ----------------------------------
>
> Key: HDFS-9667
> URL: https://issues.apache.org/jira/browse/HDFS-9667
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.6.0, 2.7.0
> Reporter: ade
> Assignee: ade
> Fix For: 2.6.0
>
> Attachments: HDFS-9667.0.patch
>
>
> We enabled the heterogeneous storage in our cluster and there are only ~50%
> of datanode & regionserver hosts with SSD. We set hfile with ONE_SSD
> storagepolicy but we found block's all replica are DISK often even local host
> with SSD storage. The block placement do not choose SSD first to place
> replica.
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