Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor

  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


    User Avatar

    Staff: Mentor


    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


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    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


    User Avatar

    Staff: Mentor

    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

    User Avatar
    Science Advisor
    Homework Helper

    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


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook