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Supercomputing

How To Build a Homebrew PS3 Cluster Supercomputer 211

eldavojohn writes "UMass Dartmouth Physics Professor Gaurav Khanna and UMass Dartmouth Principal Investigator Chris Poulin have created a step-by-step guide designed to show you how to build your own supercomputer for about $4,000. They are also hoping that by publishing this guide they will bring about a new kind of software development targeting this architecture & grid (I know a few failed NLP projects of my own that could use some new hardware). If this catches on for research institutions it may increase Sony's sales, but they might not be seeing the corresponding sale of games spike (where they make the most profit)."
Operating Systems

Replacing Atime With Relatime in the Kernel 416

eldavojohn writes "Our friend Jeremy at the Kernal Trap has dug up some interesting criticism of atime from Linus Torvalds. As Linus submitted patches to improve relatime he noted: 'I cannot over-emphasize how much of a deal it is in practice. Atime updates are by far the biggest IO performance deficiency that Linux has today. Getting rid of atime updates would give us more everyday Linux performance than all the pagecache speedups of the past 10 years, _combined_.' And later severely beat atime about the head with a pointed stick: 'It's also perhaps the most stupid Unix design idea of all times. Unix is really nice and well done, but think about this a bit: 'For every file that is read from the disk, lets do a ... write to the disk! And, for every file that is already cached and which we read from the cache ... do a write to the disk!'" Well, I guess I can expect my Linux machine to become a little bit faster!"

Vista Use Grows as Mac OS X Stays Flat 387

jdelator writes to mention ComputerWorld is reporting that Microsoft's Windows Vista has increased their market share steadily every month while their main opponent, Mac OS X, has remained essentially flat. "According to Net Applications, in June Windows Vista accounted for 4.52% of all systems that browsed the Web, up from January's 0.18%. Vista has grown its usage share each month since its release to consumers Jan. 30, hitting 0.93% in February, 2.04% in March, 3.02% in April and 3.74% in May. Apple Inc.'s Mac OS X, meanwhile, accounted for 6.22% in January and hit its high point of 6.46% in May, but it slipped back to 6% in June. If Vista's uptake trend continues, it should pass Mac OS X in Web usage share by the end of August."
Censorship

Digg.com Attempts To Suppress HD-DVD Revolt 1142

fieryprophet writes "An astonishing number of stories related to HD-DVD encryption keys have gone missing in action from digg.com, in many cases along with the account of the diggers who submitted them. Diggers are in open revolt against the moderators and are retaliating in clever and inventive ways. At one point, the entire front page comprised only stories that in one way or another were related to the hex number. Digg users quickly pointed to the HD DVD sponsorship of Diggnation, the Digg podcast show. Search digg for HD-DVD song lyrics, coffee mugs, shirts, and more for a small taste of the rebellion." Search Google for a broader picture; at this writing, about 283,000 pages contain the number with hyphens, and just under 10,000 without hyphens. There's a song. Several domain names including variations of the number have been reserved. Update: 05/02 05:44 GMT by J : New blog post from Kevin Rose of Digg to its users: "We hear you."

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