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Ask Slashdot: What's the Most Depressing Sci-fi You've Ever Read?

lightyear4 John Updike : Toward the End of Time (1365 comments)

Though Updike is rarely considered in this genre, his "Toward the End of Time" is very much sci-fi and without question rather dark. It's a story of mortality and decline, set in a post-apocalyptic environment in the near future, following a nuclear war. The US has fallen into anarchy; men are no longer able to reach orbit. No grey goo, but nanotech run amok.

more than 2 years ago
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Syrians Using Donkeys Instead of DSL After Gov't Shuts Down Internet

lightyear4 RFC1149 Needs an update (207 comments)

Now RFC1149 for 'IP over avian carriers' needs an addendum. IETF go!

more than 3 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Re:Xen did it first (86 comments)

Yep, vmotion's explicit arp wins in that regard, whereas as I suggest Xen requires tweaks in order to function optimally.

more than 5 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Re:Xen did it first (86 comments)

Such is the state of affairs with open source. I've been using Kemari in production for almost six months now. Some research prototypes are quite production-environment friendly.

more than 5 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Re:Xen did it first (86 comments)

Sounds like a delay on the switch. Add a gratuitous arp using arping in whatever vif-* script you're employing for virtual machine network interfaces and that problem will disappear.

more than 5 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Re:Xen did it first (86 comments)

Xen live migration does not involve 'continuous memory snapshotting' -- the referenced Kemari utilizes a combination of i/o triggers and observation of shadow page tables (nested page tables, ideally, if the hardware supports it. AMD's RVI and Intel's EPT). Kemari's equivalent of a lockstep vm gets only hot updates on dirtied pages, not a full memory snapshot. The alternative would of course be a rather inefficient design.

more than 5 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Re:Instantly? (86 comments)

Instantly? Of course not. But the time required is equivalent to vmotion/live migration in bog-standard virtualization. How long? "That depends." To throw numbers at you, 30-100ms -- variance largely dependent upon how quickly your network infrastructure can react to MACs changing locations, whether in-flight TCP streams are broken as a result, etc. To help switches cope, people usually send a gratuitous ARP to jumpstart the process.

more than 5 years ago
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First Look At VMware's vSphere "Cloud OS"

lightyear4 Xen did it first (86 comments)

Check out the Kemari and Remus projects, which allow precisely the same in Xen environments. In essence, it's a continual live migration (vmware people, think continual vmotion) that resumes virtual machine execution on the backup node if the origin node dies. Very cool tech. The demonstration involved pulling the plug on one of the nodes. For more information just search, there are code and papers and presentation slides galore.

more than 5 years ago
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Researchers Work To Perfect Computerized Lip Reading

lightyear4 Silent films given voice (117 comments)

Bringing audio and/or transcript to silent films is also where such technology is applicable. An excellent documentary about computerized lip reading to accomplish the very same may be found via google video : http://video.google.com/videoplay?docid=189608705425991617&hl=en . I know it's quite early for an indirect invocation of Godwin's Law, but the documentary content is nevertheless quite related to this topic. It is entitled "Hitler Speaks" in reference to silent videos filmed in Hitler's presence.

more than 6 years ago

Submissions

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lightyear4 lightyear4 writes  |  about 8 years ago

lightyear4 writes "In response to uproar caused by reports of a 256GB Geometrically Encoded Paper Storage Device, Techworld has revisited the concept in revealing detail. The claim of such storage capacity has been thoroughly debunked by alert readers; all conceived methods of encoding fall far short of the claimed 2.7GB/in density. "One expert has called the claims 'the storage equivalent of perpetual motion.'" Furthermore (assuming for sake of argument that the claim was legitimate), current optical scanners are not remotely capable of performing at the required level of clarity. And so we remain, eagerly awaiting holographic storage.

Related story: 256GB Geometrically Encoded Paper Storage Device"
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lightyear4 lightyear4 writes  |  more than 8 years ago

lightyear4 writes "As disclosed in a Google Groups posting and here reported in greater detail, the Google Video Team has accidentally sent the W32/Kasper.A@mm virus to the inboxes of approximately 50,000 subscribers. Better known as the Kama Sutra worm, it deletes files and registry keys on vulnerable systems. In an attempt to correct its error, Google urges affected individuals to download the free symantec antivirus from its free software collection."

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