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From Steve Loughran <ste...@apache.org>
Subject Re: HDFS vs Giant Direct Attached Arrays
Date Mon, 22 Feb 2010 12:23:56 GMT
Allen Wittenauer wrote:
> On 2/19/10 11:08 AM, "Edward Capriolo" <edlinuxguru@gmail.com> wrote:
>> Now, imagine if this was a 6 node hadoop systems with 8 disks a node,
>> and we had to do a firmware updates. Wow! this would be easy. We could
>> accomplish this with no system-wide outage, at our leisure. With a
>> file replication factor of 3 we could hot swap disks, or even safely
>> fail an entire node with no outage.
> ... except for the NN and JT nodes. :)

or DNS.

That plane crash in Palo Alto last week took out some of our wifi user 
authentication stuff I needed in the UK to get my laptop on the network 
in a meeting room, thus forcing me to pay attention instead.

Remember, there's always a SPOF.


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