jm + progress   4

A SPOF UPS. There was a similar AZ-wide outage in one of the Amazon DUB datacenters with a similar root cause, if I recall correctly -- supposedly redundant dual UPS systems were in fact interdependent, in that case, and power supply switchover wasn't clean enough to avoid affecting the servers.
Minutes later power was restored was resumed in what one source described as “uncontrolled fashion.” Instead of gradual restore, all power was restored at once resulting in a power surge.   BA CEO Cruz told BBC Radio this power surge  caused network hardware to fail. Also server hardware was damaged because of the power surge.

It seems as if the UPS was the single point of failure for power feed of the IT equipment in Boadicea House . The Times is reporting that the same UPS was powering both Heathrow based datacenters. Which could be a double single point of failure if true (I doubt it is)

The broken network  stopped the exchange of messages between different BA systems and application. Without messaging, there is no exchange of information between various applications. BA is using Progress Software’s Sonic [enterprise service bus].

(via Tony Finch)
postmortems  ba  airlines  outages  fail  via:fanf  datacenters  ups  power  progress  esb  j2ee 
26 days ago by jm
Nikola Tesla Wasn't God And Thomas Edison Wasn't The Devil
Correcting some egregious misconceptions about an Oatmeal comic regarding Tesla and Edison -- explaining some realities about invention, scientific progress, and the history of electricity. "I’d contend that nearly every invention in the engineering or sciences is an improvement on what has come before – such as Tesla’s improvements to alternating current. That’s what innovation is. It’s a social process that occurs in a social context. As Robert Heinlein once said, “When railroading time comes you can railroad -- but not before.” In other words, inventions are made in the context of scientific and engineering understanding. Individuals move things forward – some faster than others – but in the end, the most intelligent person in the world can’t invent the light bulb if the foundation isn’t there."
nikola-tesla  history  electricity  innovation  invention  progress  science  thomas-edison  the-oatmeal 
may 2012 by jm
great Singularity contemplation from Kevin Kelly: 'to be useful, artificial intelligences have to be embodied in the world, and that world will often set their pace of innovations. Thinkism is not enough. Without conducting experiments, building prototypes, having failures, and engaging in reality, an intelligence can have thoughts but not results. It cannot think its way to solving the world's problems. There won't be instant discoveries the minute, hour, day or year a smarter-than-human AI appears. The rate of discovery will hopefully be significantly accelerated. Even better, a super AI will ask questions no human would ask. But, to take one example, it will require many generations of experiments on living organisms, not even to mention humans, before such a difficult achievement as immortality is gained.'
ai  singularity  ray-kurzweil  kevin-kelly  science  progress  technology  future  philosophy  intelligence  knowledge  thinkism 
july 2009 by jm

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