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Cluster Speed Advice

  1. Jul 18, 2006 #1
    Fastest Computer

    Where would I find information on the fastest computers in the world?
  2. jcsd
  3. Jul 18, 2006 #2
    Here is a http://www.top500.org/lists/2006/06" [Broken]
    Last edited by a moderator: May 2, 2017
  4. Jul 18, 2006 #3
    can u convert 280.6 TFlop/s to a more managable unit?
    also, how fast is one megaflop
  5. Jul 18, 2006 #4


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  6. Jul 18, 2006 #5
    Well I do not understand your question.

    A flop is one floating point operation (an operation on a non-integer).
  7. Jul 18, 2006 #6
    How fast is a Teraflop?

    Can someone convert 280.6 TFlop/s to more managable units?
    also, how fast is a megaflop?
  8. Jul 18, 2006 #7
    What exactly is a cluster?

    How fast are the fastest clusters, and does anyone know how fast the cluster(s) is/are at the University of Richmond?
  9. Jul 18, 2006 #8
    My mistake

    how many flops/s can any ordinary pc run? and how would i compare that to the fastest (280.6 TFlop/s)
  10. Jul 18, 2006 #9
    woops. not how fast, but how many flops are in a megaflop, or a teraflop?
  11. Jul 18, 2006 #10
    Mega and tera are both greek words.

    Mega stands for 1 000 000
    Tera stands for 1 000 000 000 000
  12. Jul 18, 2006 #11
    prefix mega means 10^6 over the basic unit.
    prefix giga means 10^9 over the basic unit.
    prefix terra means 10^12 ............

    so there are flops in a terra flop flops in a giga flop and so on....

    These prefixes can be applied to any unit, not just to flops(i.e. MegaByte but here is a kinda different story because the basic units are in bynary not decimal.)
  13. Jul 18, 2006 #12


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    A megaflop is a measure of a computer's speed and can be expressed as:
    A million floating point operations per second
    10 to the 6th power floating-point operations per second
    2 to the 20th power FLOPS


    Also http://en.wikipedia.org/wiki/Petaflops

    megaFLOPS (MFLOPS) is equal to one million floating-point operations per second, and a gigaFLOPS (GFLOPS) is equal to one billion floating-point operations per second. A teraFLOPS (TFLOPS) is equal to one trillion floating-point operations per second.


    You should be able to calculate it with this information.
  14. Jul 18, 2006 #13


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    Well, 'terra' actually means 'ground' or 'land'. :wink:

    It's 'tera' which is 1000 times bigger than 'giga'!
    Last edited: Jul 18, 2006
  15. Jul 18, 2006 #14


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    First, you know what the prefixes mean, right?

    Kilo = 1,000
    Mega = 1,000,000
    Giga = 1,000,000,000
    Tera = 1,000,000,000,000

    For the processing power of pc's, hardware review sites have them. Here is a sample: http://www.tomshardware.com/2006/07/14/core2_duo_knocks_out_athlon_64/page16.html

    Newer pc's are on the order of 10-20 gigaflops, so about 10,000 times slower than a supercomputer (which, incidentally, are often just clusters of several thousand desktop processors).
    Last edited: Jul 18, 2006
  16. Jul 18, 2006 #15

    Andrew Mason

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    It is a term used in astrophysics, physics, chemistry, computer programming, computer disk drives. Maybe they have some really fast computers at the University of Richmond.

    Check out http://en.wikipedia.org/wiki/Cluster_(physics)" [Broken].

    Last edited by a moderator: May 2, 2017
  17. Jul 18, 2006 #16
    Serious Help needed

    how do i found out how to run a test on a cluster to find out the speed?
  18. Jul 18, 2006 #17
    Well that depends what you want to measure.
    Is it pure CPU speed, for each CPU separately or on how they work togeter? Or is it disk throughput, like for some database application, network server performance? There are many things you can measure.

    So it would help if you provided some more information.
    Last edited: Jul 18, 2006
  19. Jul 18, 2006 #18
    Cluster Speed

    How do i find out the speed of a cluster? I'm supposed to figure how to run a program to determine the speed of our cluster here at UR.
  20. Jul 18, 2006 #19


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    That's a rather vague question, as we don't know anything about UR's cluster. This sounds like some kind of a lab, though, meaning you should probably have some sort of handout that provides help.

    There may a simple benchmarking program provided for you. Or maybe you have to write your own. If you have to write your own, of course, you'd have to use some kind of cluster library (MPI, etc.) to distribute the work across all the nodes in the cluster, which could be difficult.

    If you have some kind of background information, you should provide it as part of your question. Otherwise, there's really nothing we can do to help you.

    - Warren
  21. Jul 18, 2006 #20
    I dont know really. I was told to just figure out how to determine how many megaflop/s its running and compare it to other clusters (specifically the faster ones). Should I have been given more information or what?
  22. Jul 18, 2006 #21
    Well perhaps you could give us some context. Do you work there or do you study there? And is this request in anyway related to a program you follow?

    To me it seems rather odd to ask someone, who aparently is not an expert about computers ("what is tera and mega", "what is a cluster", "how fast is a teraflop"), on how you determine the combined CPU speed of a cluster.

    This is certainly not a trivial problem!
  23. Jul 18, 2006 #22
    well, im a freshman coming into the University of Richmond in the fall, and im working with one of the physics professors and some of his students over the summer. im in a program to help me get used the university and physics and whatnot.
  24. Jul 18, 2006 #23


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    Honestly, the best way to find this information is to look up who administers the cluster, and ask him/her. As we've said over and over in your multitude of threads on the topic, it's not a trivial question, nor does it have a trivial answer. It's also possible that the information you seek is on a University webpage somewhere, and you just need to find it.

    - Warren
  25. Jul 18, 2006 #24


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    There are also super computers called "vector processors" that have many very fast arithmetic units within them, enough so that peforming an operation like a floating point multiply on two arrays of numbers and either storing the results in a 3rd array or summing the results occurs at the fastest speed that the machines memory can retrieve the input data. In the case of Cray super-computers, a vector processing system can be part of a cluster. Here is one link: http://www.cray.com/products/x1e [Broken] and antoher: http://www.nec.com.au/products_detail.aspx?view=145 [Broken]
    Last edited by a moderator: May 2, 2017
  26. Jul 19, 2006 #25
    Cluster Websites

    I'm still having trouble finding a website about finding out a cluster's speed. Anyone know any decent websites?
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