Topic Title: China Has the World's Fastest Supercomputer
Topic Summary: 2 times faster than ours (USA)
Created On: 06/17/2013 01:50 PM
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 06/17/2013 01:50 PM
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stumped
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Watson may have been able to trounce a pair of Jeopardy champs, but it can't hold a candle to the new king of number crunching, the 3.12 million-core Tianhe-2.

http://gizmodo.com/china-has-the-worlds-fastest-supercomputer-and-its-2-513791711



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 06/17/2013 04:36 PM
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black_zion
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I highly doubt it is the fastest in existence, maybe the fastest that the public knows about. There's no telling what is under the ground at NORAD, or under Langley, or the Pentagon, or Area 51.

Perhaps most impressive is the amount of indigenous hardware employed in the machine. Outside of the Intel processors, "The interconnect, operating system, front-end processors, and software are mainly Chinese,"


Maybe because damn near everything these days is made IN CHINA.

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 06/17/2013 05:25 PM
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stumped
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Originally posted by: black_zion I highly doubt it is the fastest in existence, maybe the fastest that the public knows about. There's no telling what is under the ground at NORAD, or under Langley, or the Pentagon, or Area 51.
Perhaps most impressive is the amount of indigenous hardware employed in the machine. Outside of the Intel processors, "The interconnect, operating system, front-end processors, and software are mainly Chinese,"
Maybe because damn near everything these days is made IN CHINA.

Idea stolen in america and made in china.



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 06/17/2013 11:03 PM
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black_zion
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Chinese knockoff of an American design made in China for sale in America

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 06/17/2013 11:15 PM
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stumped
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Originally posted by: black_zion Chinese knockoff of an American design made in China for sale in America

...at a cheaper price



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 06/18/2013 09:00 AM
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black_zion
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I do imagine it will be short lived, Titan has been scheduled for an expansion since before it was built. I do wonder though, in terms of real world usage, which is actually faster under a typical load, the Xeon/Xeon Phi, or the Opteron/Tesla...

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 06/18/2013 03:47 PM
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Mime
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Originally posted by: black_zion I highly doubt it is the fastest in existence, maybe the fastest that the public knows about. There's no telling what is under the ground at NORAD, or under Langley, or the Pentagon, or Area 51.

Yeah well, I doubt they're going to let you take the tin foil hat off and run linpack on any of those... 

If you built a distributed cluster, like those used for projects like seti and folding@home you could end up with something faster.... if you had access to something faster than cat5 cable to string them all together.  That's basically what supercomputers are these days.  You'd just need a lot of machines. 



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Edited: 06/18/2013 at 03:59 PM by Mime
 06/18/2013 06:55 PM
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... and cluster-aware software so that you can actually do something useful with it all.  Making software cluster-aware isn't necessarily the same thing as what we usually call multithreading, because there are different types of multithreading. 

Edit: forum is post-jumping again.... or BZ is posting from the future...



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 06/18/2013 07:35 PM
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black_zion
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It does bring up a good point. Linpack is good for the news releases, and the theoretical max figures are good for their epeen, but I wonder, under some of the most widely used HPC applications, how do the top 10 or so HPCs compare...Though it would be nice if one of them had FirePro in them...

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 06/21/2013 07:30 PM
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Depends on the workloads... Although most HPC people are much more aware of what their hardware can do, so there's a better chance in general that the hardware is well-suited to the task.

The only real requirement of being part of the HPC world is that an application requires resources that the average PC doesn't have.  In the past there's been custom hardware designed for a specific purpose(like Deep Crack that was built to break DES), but these days it's more common for off-the-shelf hardware to be used.



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 06/21/2013 08:09 PM
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Aye, especially since the mainstream hardware is capable of thing which in the past took specialized hardware. I remember a few years ago when VIA put in a 256 bit AES cryptography co-processor into their units, nowdays both AMD and Intel processors support AES instructions and GPU based cryptography makes even stronger encryption speed along.

Really the only thing which separates hardware now is if you want CUDA or not. I remember reading a couple of articles which compared CUDA to OpenCL, and that while CUDA was faster (proprietary language, direct access to resources) and OpenCL slower (cross platform language, non native access to resources) the differences weren't astounding, but program developers are still praising CUDA which helps nVidia shift their Tesla cards into HPCs.

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 06/21/2013 09:08 PM
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AES though is "secure enough" though. Brute forcing a 256 bit AES encrypted file even with GPU assistance would still take far longer than it's worth, especially considering all the companies and people who leave sensitive information out in the open. Take a look at the article Here from 2011.

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 06/21/2013 10:56 PM
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Mime
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Yeah, AES is the algorithm which replaced DES.  I just always thought it was funny(in a very geeky way) that a custom machine was built to break DES.  AES can be derived from the ground up, so every behavior of the algorithm is completely known.  DES can't be.  There are parts of the algorithm which just work without any explanation why.  That always made some people nervous about exactly where those parts of the algorithm came from.



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 06/23/2013 01:22 AM
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Originally posted by: black_zion AES though is "secure enough" though. Brute forcing a 256 bit AES encrypted file even with GPU assistance would still take far longer than it's worth, especially considering all the companies and people who leave sensitive information out in the open. Take a look at the article Here from 2011.

I hope you don't think THG is an authority on cryptography. 

But yeah... AES is considered "strong" cryptography.  I'd probably still use RSA where security is critical, but so long as you avoid the ECB mode and use something like CFB or CTR which allows for a random initialization vector you can get pretty good security out of it.



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