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From "vamshi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1052) HDFS scalability with multiple namenodes
Date Fri, 22 Jul 2011 10:03:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13069477#comment-13069477
] 

vamshi commented on HDFS-1052:
------------------------------

suresh, i went through the Desingn document (NamenNode Federation).What i was trying to ask
is, after we make NameNode distributed among multiple nodes, there exist unique Namespace
with respect to each NameNode. Now , when a client requests for some block location,it should
be searched in the group of NameNodes for that block details(meta data). For this lookup/searching
of metadata, can we use Distributed Hashing? please let me know some thing regarding it. Thank
you

> 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
>             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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