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https://issues.apache.org/jira/browse/HDFS-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15410387#comment-15410387
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Amithsha commented on HDFS-1052:
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Hi all,
>From the doc and examples i could see that Namenode Federation will reduce the
>pressure on single namenode by scaling it horizontally.
At, the same time i want to know that if i have directory structure like this
/project/project1
/project/project2
so project1 is in NN1 & project2 is in NN2
project/project1 - NN1
/project/project2 - NN2
MR Job running on the top of /project so how it will detect the BlockLocation
of /project/project1 & /project/project2
1) Do i need to mention the hdfs url of /project/project1 & /project/project2
????
> HDFS scalability with multiple namenodes
> ----------------------------------------
>
> Key: HDFS-1052
> URL: https://issues.apache.org/jira/browse/HDFS-1052
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: namenode
> Affects Versions: 0.22.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Fix For: 0.23.0
>
> Attachments: Block pool proposal.pdf, HDFS-1052.3.patch,
> HDFS-1052.4.patch, HDFS-1052.5.patch, HDFS-1052.6.patch, HDFS-1052.patch,
> Mulitple Namespaces5.pdf, high-level-design.pdf
>
>
> HDFS currently uses a single namenode that limits scalability of the cluster.
> This jira proposes an architecture to scale the nameservice horizontally
> using multiple namenodes.
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