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https://issues.apache.org/jira/browse/HDFS-14355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16794975#comment-16794975
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Feilong He commented on HDFS-14355:
-----------------------------------
Thanks [~rakeshr] for your valuable comment. I got your point about the
configuration for cache capacity of pmem. As synced with you, actually it is
not reasonable to make pmem share this configuration with memory in the current
implementation, since DataNode will also use this configuration to control
memory usage for Lazy Persist Writes. I will update the patch for fixing this
potential critical issue and other issues put forward in your other comments.
Thanks so much!
> Implement HDFS cache on SCM by using pure java mapped byte buffer
> -----------------------------------------------------------------
>
> Key: HDFS-14355
> URL: https://issues.apache.org/jira/browse/HDFS-14355
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: caching, datanode
> Reporter: Feilong He
> Assignee: Feilong He
> Priority: Major
> Attachments: HDFS-14355.000.patch, HDFS-14355.001.patch,
> HDFS-14355.002.patch
>
>
> This task is to implement the caching to persistent memory using pure
> {{java.nio.MappedByteBuffer}}, which could be useful in case native support
> isn't available or convenient in some environments or platforms.
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