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https://issues.apache.org/jira/browse/HDFS-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12886384#action_12886384
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Suresh Srinivas commented on HDFS-1052:
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Min, yes distributed namespace could be another proposal to solve this problem.
However, it is a lot more complicated solution to develop, takes much longer
time and involves a lot of changes to the system. This does not fit the time
line in which we need a solution to namenode scalability.
> 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: name-node
> Affects Versions: 0.22.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: Block pool proposal.pdf, Mulitple Namespaces5.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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