Floating point speed

[AF>France>Est>Lorraine]Emmanuel
[AF>France>Est>...
Joined: 22 Jan 05
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Topic 189840

Hi,

from the serveur status page from Einstein@home one can see these infos. :

"
floating point speed 202.6 TFLOPS
floating point speed in past 7 days 54.1 TFLOPS
"

What are the differences between these two numbers ? Do they traduce the fact that we are now crunching in a very slowest way or that the number of crunchers dratsically reduced ?
Do anyone know if there is such kind of stat (not coblle stone but FLOPS) for all projects, and for all Boinc ? (i know it for seti classic)
That may be interesting to compare these number to the fastest computer (blue gene from IBM, 360 Teraflops from http://researchweb.watson.ibm.com/bluegene/).

Emmanuel.

echoray
echoray
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Floating point speed

Quote:

floating point speed 202.6 TFLOPS
floating point speed in past 7 days 54.1 TFLOPS

The first number is the accumulated speed of all participating computers. But it is more or less meaningless since not all computers are active at any given time. The second number is the speed that was reached on average in the last week.

Skip Da Shu
Skip Da Shu
Joined: 18 Jan 05
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RE: Hi, from the serveur

Quote:

Hi,

from the serveur status page from Einstein@home one can see these infos. :

"
floating point speed 202.6 TFLOPS
floating point speed in past 7 days 54.1 TFLOPS
"

What are the differences between these two numbers ? Do they traduce the fact that we are now crunching in a very slowest way or that the number of crunchers dratsically reduced ?
Do anyone know if there is such kind of stat (not coblle stone but FLOPS) for all projects, and for all Boinc ? (i know it for seti classic)
That may be interesting to compare these number to the fastest computer (blue gene from IBM, 360 Teraflops from http://researchweb.watson.ibm.com/bluegene/).

Emmanuel.


In a Scientific American article from earlier this year there was an article about public DC projects. In that article they say Blue Gene can do 70 TFLOPS and SETI can do 100. You can probably google "Processing for Science" as that was the article title.... never mind, I found it.
http://www.sciam.com/article.cfm?articleID=0001BDCA-77CB-1264-B1DB83414B7F0000

UPDATED:

Here's the paragraph I was refering to:

Save for computationally intense tasks such as rendering graphics, typical modern PCs that perform at least one billion floating-point operations per second (that is, most home computers built since about 2000) almost never employ their full power. Distributed computing takes advantage of this spare capacity, dividing large tasks into tinier ones and sending them over the Internet for usually idle computers to work on. The result is unparalleled processing muscle: IBM's BlueGene/L, now the most powerful supercomputer, cranks out about 70 trillion flops; meanwhile SETI@home conservatively runs off roughly 500,000 PCs at more than 100 trillion flops, says SETI@home director David P. Anderson.

____________

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"A child's exposure to technology should never be predicated on an ability to afford it."

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