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Old 2005-02-21, 11:20   #1
MrNetGuy
 

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Default BeoWolf Clusters

Does anyone know anything about running Prime95 on a BeoWolf cluster?
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Old 2005-02-21, 11:38   #2
MrNetGuy
 

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Exclamation BeoWolf = Beowulf

Sorry about the spelling! BeoWolf=Beowulf

The reason for the question is my friend and I were discussing really 'heating up' an overclocked processor and Intel's site said Prime95. That lead to your site and our personal 'thread' of thought then became crunching primes. The next logical semi LOW CO$T step could possibly be a BeoWulf cluster... We tech support computers and quite often an owner will give us their old equipment. This has led to several tall stacks of old machines P1 - 200Mhz and above we can't bear to throw out yet. If we procured some fast fibre cards... perhaps a BeoWulf cluster? The question is... would Prime95 scale to a BeoWulf cluster and has anyone done this?

There is probably a thread already on this but we are 'newbies' to your fine forum and haven't had much chance to look around. We do apologize in advance if this is already addressed.

Thank you for your time.
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Old 2005-02-21, 11:54   #3
leifbk
 
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The Linux version of Prime95 is named mprime, and is probably the version you would want to run on a Beowulf cluster.

The question has been raised here before, and I think the consensus is that it's not worth the bother. As the GIMPS software already is a distributed project, you're far better off just setting up a copy of the program on each of the computers and let them chug away, each on their own exponent. Any clustering technology will introduce its own overhead, thus slowing down the overall process.

One other point worth mentioning: Unless you live in the cooler parts of the world, and need to heat up the house anyway, running GIMPS on a heap of antiquated hardware is IMO a waste of energy.

regards, Leif.
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Old 2005-02-21, 17:43   #4
moo
 
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i can offer some help
http://www.beowulf.org/overview/howto.html
info site

http://www.phy.duke.edu/~rgb/Beowulf...ook/index.html
good book/still in devolopment on web

http://www.g4tv.com/screensavers/fea..._Clusters.html
something done by techtv on baywolfs

comes of of deep hole of links\|/
http://ganglia.sourceforge.net/


http://www-unix.mcs.anl.gov/mpi/
could be usefil
http://www.csm.ornl.gov/pvm/pvm_home.html
also could be usefil




http://bofh.be/clusterknoppix/
premade cluster version of bootable knoppix



prime 95 donest run on a cluster envrioment

Last fiddled with by moo on 2005-02-21 at 17:44
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Old 2005-02-22, 15:40   #5
mrnetguy
 

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Smile Thank you all!

Thank you for the comments.
We'll eventually put more machines on Prime95 and overclock them. Hopefully we won't melt to many uProcessors. Hehee !!!
If we do we'll get some pics and link them here.
We finally got Prime95 to work after several hours of "error 23 Unable to communicate with server,"
It's now 44.22%
This sure beats SETI for system idle time.
The chances of finding anything were quite remote with SETI.
The chances of finding a mersenne prime are almost 100%.
Not that we would be THE ONE to find it, but we can help sift out the final prime from the chaff.
Prime95 was responsible for what, Something like 5 of the last mersenne prime finds?
Does anyone have a reasonalby accurate guess as to what Mxx Prime95 should hit the 10 million digit prime? Is there a mathmatical formula to predict that? If it does exist is it linear?
Glad to be onboard!
Thanks again !!!
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Old 2005-02-22, 22:31   #6
Uncwilly
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Quote:
Originally Posted by mrnetguy
Prime95 was responsible for what, Something like 5 of the last mersenne prime finds?
7 and likely 1 more by next week (it is being verified).
Quote:
Originally Posted by mrnetguy
Does anyone have a reasonalby accurate guess as to what Mxx Prime95 should hit the 10 million digit prime? Is there a mathmatical formula to predict that? If it does exist is it linear?
Well the last prime found and the one being verified are seeming to mess with the trend a bit, but check this link: http://www.utm.edu/research/primes/n...tMersenne.html
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Old 2005-02-23, 04:51   #7
MrNetGuy
 

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Talking Nice Link

That was a great link:

Well the last prime found and the one being verified are seeming to mess with the trend a bit, but check this link: http://www.utm.edu/research/primes/...xtMersenne.html

It is LINEAR!!! I was thinking that this prime business is probably one of the most interesting things since Fibonacci. Then from the link above were found all kinds of Fibonacci Prime stuff. Whoohooo!!! Math heaven!!!

There may be a typo or something at:

http://primes.utm.edu/glossary/page....FibonacciPrime

within the last sequence of numbers, shown here with <> around numbers that are prime forward and reversed, [] around number forward not prime factors, and {} around number reversed not prime factors:

<3>, 4[2.2], <5>, <7>, 9[3.3], 14[2.7], <17>, 21[3.7]{2.2.3}, 25[5.5]{2.2.13}, 26[2.13]{2.31}, 65[5.13]{2.2.2.7}, 98[2.7.7], 175[5.5.7], <191>, 382[2.191], 497[7.71]{2.397}, 653{2.2.89}, 1577[19.83]{23.337}, 1942[2.971]{47.53}, 1958[2.11.89]{11.11.71}, 2405[5.13.37]{2.2521}, 4246[2.11.193]{2.2.2.11.73}, 4878[2.3.3.271]{2.2.2.2.3.3.61}, 5367[3.1789]{3.5.509}

Alot of these numbers are not Fibonacci sequence numbers anyway.
Wanted to get some consensual validation before submitting typos to the author...
AM I MISSING WHAT THE AUTHOR IS TRYING TO CONVEY?
Sometimes I screw up that way...
The Prime link is a VERY GREAT LINK still !
Thank you for your time.
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Old 2005-02-23, 05:10   #8
MrNetGuy
 

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Exclamation DIREGUARD PREVIOUS POST !!! I DID SCREW UP

I SCREWED UP, MISSED THE U SUB N... AREN'T SMART GIRLFRIENDS WONDERFUL !!! SHE FOUND IT FOR ME.
DAMN !!! IT'S ALWAYS THE SIMPLE THINGS !!!
WHIMPER WHIMPER WHIMPER...
-=- FACE GETTING RED -=-
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Old 2005-02-23, 05:20   #9
moo
 
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mrnetguy may i sugest you sign up for the forums insted of posting as a guest ;) just a thot
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