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https://issues.apache.org/jira/browse/HDFS-5324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793497#comment-13793497
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Milind Bhandarkar commented on HDFS-5324:
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Sanjay, Agreed with both your comments. AbstractNamesystem should not be
treated as a public stable Hadoop API, but directed towards HDFS developers
only. If someone has own private implementation, not part of Apache HDFS, then
HDFS developer community has freedom to modify AbstractNamesystem in
incompatible ways.
> Make Namespace implementation pluggable in the namenode
> -------------------------------------------------------
>
> Key: HDFS-5324
> URL: https://issues.apache.org/jira/browse/HDFS-5324
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.1.1-beta
> Environment: All
> Reporter: Milind Bhandarkar
> Assignee: Milind Bhandarkar
> Fix For: 3.0.0
>
>
> For the last couple of months, we have been working on making Namespace
> implementation in the namenode pluggable. We have demonstrated that it can
> be done without major surgery on the namenode, and does not have noticeable
> performance impact. We would like to contribute it back to Apache HDFS.
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