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https://issues.apache.org/jira/browse/HDFS-14356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16847371#comment-16847371
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Feilong He commented on HDFS-14356:
-----------------------------------
[^HDFS-14356.006.patch] has been uploaded, in which cache read operation was
optimized with direct byte buffer. A 3-round DFSIO read test on 50*200MB files
shows that our cache read optimization can bring *16% performance improvement*
in terms of throughput metric.
> Implement HDFS cache on SCM with native PMDK libs
> -------------------------------------------------
>
> Key: HDFS-14356
> URL: https://issues.apache.org/jira/browse/HDFS-14356
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: caching, datanode
> Reporter: Feilong He
> Assignee: Feilong He
> Priority: Major
> Attachments: HDFS-14356.000.patch, HDFS-14356.001.patch,
> HDFS-14356.002.patch, HDFS-14356.003.patch, HDFS-14356.004.patch,
> HDFS-14356.005.patch, HDFS-14356.006.patch
>
>
> In this implementation, native PMDK libs are used to map HDFS blocks to SCM.
> To use this implementation, user should build hadoop with PMDK libs by
> specifying a build option. This implementation is only supported on linux
> platform.
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