We were less interested in whether students can simply reproduce what they have learned in school, but we wanted to test whether they can extrapolate from what they know and apply their knowledge in novel situations. Now, some people have criticized us for this. They say, you know, such a way of measuring outcomes is terribly unfair to people, because we test students with problems they havent seen before. But if you take that logic, you know, you should consider life unfair, because the test of truth in life is not whether we can remember what we learned in school, but whether we are prepared for change, whether we are prepared for jobs that havent been created, to use technologies that havent been invented, to solve problems we just cant anticipate today.
Archives for February 2013
Collection of useful, relevant or just fun places on the Internets for 18th February 2013 and a bit commentary about what I’ve found interesting about them:
Who needs HP and Dell? Facebook now designs all its own servers | Ars Technica – I'm continuing to watch OpenCompute closely. In a carefully designed cloud, you don't need Cisco UCS, just "a server".
Facebook says it gets 24 percent financial savings from having a lower-cost infrastructure, and it saves 38 percent in ongoing operational costs as a result of building its own stuff. Facebook's custom-designed servers don't run different workloads than any other server might—they just run them more efficiently.
"An HP or Dell server, or Open Compute server, they can all generally run the same workloads," Frankovsky said. "It's just a matter of how much work you get done per watt per dollar."
Everyone’s a Critic: The Critic Markup Language Proposal – More details on the Critic Markup language. A plain text markup so that people can perform change tracking on documents and not be locked into a proprietary format. If you aren't using Markdown today, then it's time to start finding a place in your workflow.
inessential.com: RSS Sync Apocalypse Preview – Talking about the apparent Google abandonment of RSS reader. Feedburner is also at risk. Tough times for RSS ?
Ethernet at 40: Its daddy reveals its turbulent youth • The Register – My favourite part of this article with Bob Metcalfe on the history of Ethernet
We asked Metcalfe what the main usage-model requirements that his work on Ethernet were intended to solve. "No one wrote a requirements document," he said, "this is a research center."
Cisco Forecasts Sales That Miss Some Analysts’ Estimates – Bloomberg – Bloomberg suggesting that Cisco didn't do very well, and the future isn't looking any better
Cisco Systems Inc. forecast sales this quarter that missed analysts’ most optimistic projections, citing growth challenges in China and Europe and the prospect of lackluster government demand for networking equipment.
With luck on your side, you can do without brains.
I’ve been reading a presentation from Sharkfest 2012 where a engineers from Microsoft are presenting on their
Microsoft’s Demon – Datacenter Scale Distributed Ethernet Monitoring Appliance. The whole presentation is interesting but this particular slide caught my attention:
This suggests that Merchant Silicon (from companies like Intel, Broadcom and Marvel) will reach 256 ports of 10GbE Ethernet by 2015. Now it’s really hard to get hold of a roadmap for merchant silicon, it’s tightly controller & secretive so this is best I can find on merchant silicon futures.
What does this mean ? Existing top of rack switches with 48 x 10Gb ports have 64 x 10GbE ports internally, the other 16 x 10GbE are usually 4x40GbE.
This are likely to be replaced by 256 x 10GbE silicon with a likely configuration with 64 x 40GbE configuration. Each 40GbE interface can either be a 4 x 10GbE or 1 x 40GbE because of the way that 40GbE PHY is setup.
A QSFP is highly likely to cheaper than four 10GBaseSR SFP modules in my opinion. Although efforts to Short Range transceivers for Top of Rack in on the way, I’m doubtful that it will get much traction in the market.
The EtherealMind View
I figure that the following ideas become a bit clearer.
- 40 GbE will arrive for Top of Rack solutions in 2016
- Switches in the campus backbone and aggregation layers should be ready for replacement / upgrading in 2016 to support 40GbE
- Do not install any cabling in your data centre or campus backbone. 40GbE uses 8 fibre cores for multimode and 1 pair for single mode. The cable will be OM4 although OM3 will have shorter distances. Provision the least amount of cable until new cabling solutions arrive.
- Spending money on expensive 10GbE switches will be wasted as they are likely to be replaced in 2016 with 40 GbE. Most server people are already deploying/asking for 4 x 10GbE per chassis and it probably be cheaper to use a 40GbE QSPF than four 10Gig SFP modules in two to three years time.
I have nothing to disclose in this article. My full disclosure statement is here