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From ESGLinux <esggru...@gmail.com>
Subject Question about HA and Federation
Date Thu, 20 Dec 2012 16:30:30 GMT
Hi All,

I´m going to test a hadoop cluster and I have a doubt about HA and
Federation.

With federation I Have a NameNode per namespace and with HA I have an
Active NameNode and a standby NameNode.

so, as I have sevaral namespaces, do I need an Active NameNode and a
standby nameNode per namespace?

I have read this documentation but It´s not clear for me :-(

https://ccp.cloudera.com/display/CDH4DOC/Introduction+to+Hadoop+High+Availability
http://hadoop.apache.org/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/Federation.html

Thanks in advance

ESGLinux

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