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https://issues.apache.org/jira/browse/HDFS-14703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17321979#comment-17321979
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Renukaprasad C commented on HDFS-14703:
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[~shv] Thanks for sharing design and the patch.

There are some files missing in 002-partitioned-inodeMap-POC.tar.gz. Are these 
changes intended? or your POC test done on  001-partitioned-inodeMap-POC.tar.gz 
patch only?

> NameNode Fine-Grained Locking via Metadata Partitioning
> -------------------------------------------------------
>
>                 Key: HDFS-14703
>                 URL: https://issues.apache.org/jira/browse/HDFS-14703
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs, namenode
>            Reporter: Konstantin Shvachko
>            Priority: Major
>         Attachments: 001-partitioned-inodeMap-POC.tar.gz, 
> 002-partitioned-inodeMap-POC.tar.gz, NameNode Fine-Grained Locking.pdf, 
> NameNode Fine-Grained Locking.pdf
>
>
> We target to enable fine-grained locking by splitting the in-memory namespace 
> into multiple partitions each having a separate lock. Intended to improve 
> performance of NameNode write operations.



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