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Networking

Submission + - OpenFlow takes networks in a different direction (theregister.co.uk)

mister_dave writes: As network topologies and data access patterns have evolved, load profiles can change so quickly that a completely new approach to networking is required. That approach is OpenFlow. According to Renato Recio, IBM Fellow and system networking CTO, life before the advent of x86 virtualisation was simple: client computers did most of the heavy lifting.

Then along came virtualisation and suddenly we’re back out into the weeds. In a fully virtualised datacenter, any workload can be located on any physical server inside any rack. Not only that, but these workloads move.

To see how an OpenFlow switch might work in a real environment, we have to look at how these rules might be applied.

A switch sees a frame from MAC address A destined for MAC address B. The central configuration server is aware of which MAC addresses live on which ports of which switches across the entire fabric. The server is also aware of link states for every connection, as well as throughput statistics per port.

Since the central database is aware of all this, so too are the individual switches. The best route between the source switch and the destination switch is computed and the frame is forwarded.

Should a link anywhere in the switching fabric become saturated or a cable become unplugged, the central database is made aware of it. The information is quickly disseminated throughout the fabric, and new paths for packets can then be computed as required. This provides high availability with fast convergence.

Software

Submission + - How Four Financial Firms Crunch Big Data (Spoiler Alert: Elephants) (datanami.com)

An anonymous reader writes: When it comes to big data at financial, risk and banking organizations, data size is only a small part of the problem. The real challenge, at least according to information managers at Bank of America, Credit Suisse and others is dealing with data complexity and speeding the time to results. Whether the end goal is focused on making portfolio assessments in

Comment Re:Smart but not nice (Score 1) 227

They could be doing it not just for practical purposes but possibly for setting up a DeBeers of rare earth metals.

Maybe they've just produced more than they can use?

the People's Bank of China cut rates in the world's second largest economy for the second time this year. This was quite unexpected and shows that Chinese policymakers have become seriously rattled by the evident slowdown in their economy.

...once buoyant Western export markets are in ragged retreat, and just how much more investment can the Chinese economy take before knocking up against already manifest levels of industrial overcapacity?

Comment stick to your knitting (Score 2) 407

Also discussed is the company's loyalty to Windows and Office, which induced a myopia that repeatedly kept Microsoft from jumping on emerging technologies like e-readers and other technology that was effective for consumers.

They'd be foolish not to be loyal to windows and office. Those were/are two fabulously successful products.

I think there is a strong case for MS ignoring any options for broadening their product range, and just focussing on their existing winners.

Comment Re:Infrastructure (Score 1) 183

the evil socialists in Europe who manages to do these things cheaper and more affordable using their communist-era ideology.

Nothing involving the British Government is done 'cheaper'. They strive to find the most expensive option. However perverse.

The Government says it needs £110bn of investment in new energy production plant to keep the lights on. That's slightly down from the £120bn figure the Department had cited earlier, but it needs to be qualified. That sum is "needed" to meet EU climate change target of a 20 per cent reduction in CO2 emission by 2020 using renewable energy production. Given the worldwide retreat from carbon dioxide mitigation policies, and the current financial situation within the EU, it's unlikely that a single European government will adopt a similar commitment, with a similar kind of energy mix.

So why the scare quotes around "need" - just how necessary is that £110bn? It's a good question. The cost of building new open-cycle gas-fired plant to meet the requirement is £13bn. What inflates the figure by a factor of eight is the commitment to do it using renewable energy and nuclear.

Comment Re:C'mon (Score 2, Informative) 288

the majority of people who are *literate* in science and math (including, what, about 95% of climate scientists?) agree that global warming is real and we need to do something about it.

Not true.

Comment Re:Why Did Amelia Earhart's Plane Crash? (Score 3, Informative) 98

The! Science! Says!

Women drivers are more likely to be involved in an accident, according to scientists.

Researchers looked at 6.5million car crashes and found a higher than expected number of accidents between two female drivers.

The scientists also found that women were more likely than men to crash at a junction

Comment Re:mercury delay (Score 1) 88

Then my memory was at fault. However, wikipedia reminds me that Lyons contributed finance to EDSAC.

Standingford and Thompson saw the potential of computers to help solve the problem of administering a major business enterprise. They also learned from Goldstine that, back in the UK, Douglas Hartree and Maurice Wilkes were actually building another such machine, the pioneering EDSAC computer, at the University of Cambridge.[1]

On their return to the UK, Standingford and Thompson visited Hartree and Wilkes in Cambridge, and were favourably impressed with their technical expertise and vision. Hartree and Wilkes estimated that EDSAC was twelve to eighteen months from completion, but said that this timeline could be shortened if additional funding were available. Standingford and Thompson wrote a report to the Lyons' Board recommending that Lyons should acquire or build a computer to meet their business needs. The board agreed that, as a first step, Lyons would provide Hartree and Wilkes with £3,000 funding for the EDSAC project, and would also provide them with the services of a Lyons electrical engineer, Ernest Lenaerts. EDSAC was completed and ran its first program in May 1949.[2]

Following the successful completion of EDSAC, the Lyons' board agreed to start the construction of their own machine, expanding on the EDSAC design.

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