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From Steve Loughran <ste...@apache.org>
Subject Re: risks of using Hadoop
Date Wed, 21 Sep 2011 11:00:11 GMT
On 21/09/11 11:30, Dieter Plaetinck wrote:
> On Wed, 21 Sep 2011 11:21:01 +0100
> Steve Loughran<stevel@apache.org>  wrote:
>> On 20/09/11 22:52, Michael Segel wrote:
>>> PS... There's this junction box in your machine room that has this
>>> very large on/off switch. If pulled down, it will cut power to your
>>> cluster and you will lose everything. Now would you consider this a
>>> risk? Sure. But is it something you should really lose sleep over?
>>> Do you understand that there are risks and there are improbable
>>> risks?
>> We follow the @devops_borat Ops book and have a post-it-note on the
>> switch saying "not a light switch"
> :D

Also we have a backup 4-port 1Gbe linksys router for when the main 
switch fails. The biggest issue these days is that since we switched the 
backplane to Ethernet over Powerline a power outage leads to network 
partitioning even when the racks have UPS.

see also http://twitter.com/#!/DEVOPS_BORAT

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