As a beginner to Hadoop, I am confused between NameNode and Namespace. From my understanding both of them have the same functionality, which they both contains metadata.
Is there any difference between them?
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This [link](http://stackoverflow.com/a/23924959/2302572) might help – shriroop_ Oct 07 '16 at 02:22
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@ShriroopJoshi, thanks! will check on it – Fallon19 Oct 07 '16 at 02:44
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NameNode is a Machine which will contain (Store) the namespace.
The NameNode’s primary responsibility is storing the HDFS namespace. Namespace is a hierarchy of files and directories. This means things like the directory tree, file permissions, and the mapping of files to block IDs.
In Hadoop 2.x took this a step further with the introduction of Federation, although its main purpose was to solve scaling issues in the namenode
BruceWayne
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