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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. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira