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From Marc Farnum Rendino <mvg...@gmail.com>
Subject Re: Adding hard-disks to an existing HDFS cluster
Date Mon, 01 Mar 2010 16:19:17 GMT
On Sun, Feb 28, 2010 at 5:27 PM, Eli Collins <eli@cloudera.com> wrote:

> 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.

Cool; so just to make sure I understand:

The OS presents a single directory to the NameNode; that single directory
can have other measures under it, like RAID.




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