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Posted to common-user@hadoop.apache.org by John Martyniak <jo...@beforedawnsolutions.com> on 2009/12/09 07:08:36 UTC

Namenode / Data node disk requirements

Does the namenode and data node require the same disk requirements,  
for example

On my slave machines they have a 1TB partitiion called /hdfs and a 200  
GB partition called /mapreduce for the obvious tasks

But on the namenode/jobtracker machine I don't have that, I just have  
a RAIDED pair of 500GB disks without those two directories listed above.

So the issue is when I go to do a 'bin/hadoop namenode -format' I get  
an error that says it can't find the /hdfs... directory.

What am I configuring incorrectly? Or should I put a bigger disk in  
the master machine to match the slaves.

Thanks in advance,

-John