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From Eli Collins <...@cloudera.com>
Subject Re: Adding hard-disks to an existing HDFS cluster
Date Sun, 28 Feb 2010 22:27:24 GMT
> I presume it makes no sense to try to spread the NameNode across multiple
> disks?

Not quite sure what you mean here, but dfs.name.dir (where the NN
stores its metadata) should have multiple directories on different
disks to guard against the failure of any single disk. Many people
also use RAIDed disks and include an NFS mount in dfs.name.dir to have
additional, reliable copies of this data.

Thanks,
Eli

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