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https://issues.apache.org/jira/browse/HDFS-2907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820692#comment-13820692
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Eli Collins commented on HDFS-2907:
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fyi HDFS-5194 has a plan to address gaps in FsDatasetSpi
> Make FSDataset in Datanode Pluggable
> ------------------------------------
>
> Key: HDFS-2907
> URL: https://issues.apache.org/jira/browse/HDFS-2907
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Tsz Wo (Nicholas), SZE
> Priority: Minor
> Fix For: 0.23.2
>
> Attachments: h2907_20120216.patch, h2907_20120217.patch,
> h2907_20120221.patch, h2907_20120221b.patch
>
>
> A pluggable FSDataset allows one to experiment and innovate at the DN storage
> level. For example one could implement DN storage on raw disks if one
> desired.
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