sky, Author at Sky's Blog

Building out infrastructure for a Traveling Geeks tour

3 December, 2009 by sky Leave a Comment

The Traveling Geeks are at it again. This time the destination is Paris for LeWeb and some other tech meetings.

Organizing a tour for 15 geeks was a nightmarish task for TG Co-Founder Renee Blodgett, who worked for weeks to put this one together – much shorter lead time than for previous tours. And her co-organizers Eliane Fiolet and Phil Jeudy, plus two web developers, did a heroic job.

The online developers were tasked with creating the new web site, but I came in for the last few weeks to preside over one of my (current) specialties – ensuring that we can mash information together in real time. Here’s what it required and what I learned: [Read more…]

Visualizing data helps us find opportunities

19 November, 2009 by sky Leave a Comment

I had run into GapMinder some time ago, but was reminded of it when I encountered this talk that Ola Rosling^[1] gave at Gov 2.0 Summit^[2] that really makes it clear how the visualization of data — especially visualizing data over time — can give us valuable insights into trends in the physical and social world(s). Their Trendalyzer software is used by Google…as you’ll see in this presentation. [Read more…]

The Buddha gets ready for ski season

18 October, 2009 by sky 4 Comments

Wow — I was flying down some intermediate (meaning “easy”) alpine ski run at Squaw Valley early this year when I noticed a pair of colorful skis flashing in front of me. At the top of the lift I stopped the guy who was wearing them and inquired because I noticed they were branded Lhasa skis and had a drawing of the Potola Palace on their tail.

Hmm… Tibet, mountains, snow… very cool, and this looked like fun. These are fat (also phat^[1]) skis in two senses — first, they are wide and work well in deep snow and conditions where there’s piles of snow all over the runs — and second, phat in the sense that they’d let you ski with great exhiliration and joy all over the slopes in varying conditions. [Read more…]

We await a galaxy-rise – a morning filled with 400 billion suns

17 October, 2009 by sky

During my lifetime I have gone from viewing stars thorough binoculars, and once through a 40-inch refracting telescope (Yerkes Observatory was just miles from my home – I viewed once as a child) to the amazing deep-space digital views provided by the orbiting Hubble Telescope. I watched Halley’s comet in 1986 from the deck of my home in San Francisco, through 10x binoculars. During my lifetime, scientists dealing with cosmology have advanced our thinking about how the universe (and possible 10^10^10^7 parallel universes — oh, sorry, must not forget I am actually a mathematician and the correct notation is 10¹⁰¹⁰⁷) may have gotten to its current state and where it might be going. {the photo is Phil Plaitt, the “Bad Astronomer” — thanks, Phil, for pointing me to the video which you can play below}

This music video is a trippy artistic rephrasing of how two thinkers talked about the meaning and inspiration of all of this.

[youtube zSgiXGELjbc]

Please also continue reading for footnotes and a second video where Sir Arthur C. Clarke, Stephen Hawking and Carl Sagan discuss the universe…

[Read more…]

Security in the Cloud – Matey, there be challenges ahead

14 October, 2009 by sky Leave a Comment

Being a user of and a promoter of cloud computing, I am also aware of challenges to the security of cloud computing environments. Cloud computing suppliers come in several flavors. I’ll address two of them here: 1) those who provide virtual hosts; and 2) those who provide automatically-scalable hosting solutions without distinguishable hosts.

A virtual host looks like an actual server. You (or your programmer/sysadmin) can use it as if it were your own dedicated server. In fact, however, it is only a portion of a much larger server. Rackspace/Mosso, and Slicehost are two I’ve discussed and actually use. The focus is on the virtual server.

An automatically-scalable hosting solution is a service or set of services which are hosted on one or more computers, and you can’t actually tell how big the server is or for that matter, whether it’s a whole array of servers. The focus is on the virtual service (not the server itself).

What’s good: Virtual servers are a more secure environment than shared servers because you are only dependent on your own security efforts. (On a shared server, if another user picks a poor password, or doesn’t upgrade their PHP software when security upgrades are released, you can be hacked if their account is compromised.) Automatically-scalable hosts may also be secure in this same way if accounts are adequately protected from each other.

What’s bad: A root compromise of a virtual server may be possible. In fact, it’s probably inevitable that such things will happen. And if you don’t update your underlying software (like WordPress, for instance), they you’re likely to be in trouble anyway. So ultimately any server can be compromised.

“Cloud-clobbering” (talk – is cheap)— cloud servers may become a target for hackers.at the 7th Hack in The Box Security Conference in Kuala Lumpur.

I’ve written about “economic denial-of-sustainability” attacks, in which an attacker causes a cloud user to so scale up their server usage that it becomes economically impossible for the defender to survive. These wouldn’t be possible if there were no cloud computing.