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https://issues.apache.org/jira/browse/HDFS-9666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jiandan Yang reassigned HDFS-9666:
-----------------------------------
Assignee: Jiandan Yang (was: ade)
> Enable hdfs-client to read even remote SSD/RAM prior to local disk replica to
> improve random read
> -------------------------------------------------------------------------------------------------
>
> Key: HDFS-9666
> URL: https://issues.apache.org/jira/browse/HDFS-9666
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.6.0, 2.7.0
> Reporter: ade
> Assignee: Jiandan Yang
> Priority: Major
> Attachments: HDFS-9666.0.patch, HDFS-9666.001.patch
>
>
> We want to improve random read performance of HDFS for HBase, so enabled the
> heterogeneous storage in our cluster. But there are only ~50% of datanode &
> regionserver hosts with SSD. we can set hfile with only ONE_SSD not ALL_SSD
> storagepolicy and the regionserver on none-SSD host can only read the local
> disk replica . So we developed this feature in hdfs client to read even
> remote SSD/RAM prior to local disk replica.
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