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John Forum moderator
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Welcome to the Showers to Flowers Challenge
PrimeGrid's Challenge series continues with the Showers to Flowers Challenge. Please come join us in observing Nature's wonderful cycle of spring. A 2 day (48 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application.
In some parts of the northern hemisphere, April is the month for the spring rains. It is commonly referred to as April Showers. The rains tend to taper off a bit as May approaches and the landscape turns to blooms; thus the saying, April showers bring May flowers. :)
The same can be applied to sieving and primality checking. We are hoping that April's sieving will bring May's primes. So, let the factor showers begin for the prime flowers to come. :D (FYI, with the recent Cullen find, June's Challenge will be on PSP LLR.)
To participate in the Challenge, please select only the Prime Sierpinski Project (Sieve) project in your PrimeGrid preferences section. The challenge will begin 29 April 2009 18:00 UTC and end 1 May 2009 18:00 UTC. Application builds are available for Linux 32 & 64 bit and Windows 32 & 64 bit. Note: 64 bit Windows and 64 bit Linux benefit from a 1.7X speed advantage over 32 bit...so 1.7X the credit. :)
Recommendation: The PSP (Sieve) application requires a one time download of a 10MB sieve file. Please consider running a few PSP WU's before the Challenge begins so your client will already have the sieve file. This way, bandwidth can be used to deliver WU's instead of the sieve file. :) Thank you!
Time zone converter:
The World Clock - Time Zone Converter
NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section to the left of the countdown clock.
Scoring Information
Scores will be kept for individuals and teams. Only work units issued AFTER 29 April 2009 18:00 UTC and received BEFORE 1 May 2009 18:00 UTC will be considered for credit. Since this is a fixed credit project, we'll be using cobblestones for scoring.
About the Prime Sierpinski Problem
Waclaw Franciszek Sierpinski (14 March 1882 - 21 October 1969), a Polish mathematician, was known for outstanding contributions to set theory, number theory, theory of functions and topology. It is in number theory where we find the Sierpinski problem.
Basically, the Sierpinski problem is "What is the smallest Sierpinski number" and the prime Sierpinski problem is "What is the smallest 'prime' Sierpinski number?"
First we look at Proth numbers (named after the French mathematician François Proth). A Proth number is a number of the form k*2^n+1 where k is odd, n is a positive integer, and 2^n>k.
A Sierpinski number is an odd k such that the Proth number k*2^n+1 is not prime for all n. For example, 3 is not a Sierpinski number because n=2 produces a prime number (3*2^2+1=13). In 1962, John Selfridge proved that 78,557 is a Sierpinski number...meaning he showed that for all n, 78557*2^n+1 was not prime.
Most number theorists believe that 78,557 is the smallest Sierpinski number, but it hasn't yet been proven. In order to prove it, it has to be shown that every single k less than 78,557 is not a Sierpinski number, and to do that, some n must be found that makes k*2^n+1 prime.
The smallest proven 'prime' Sierpinski number is 271,129. In order to prove it, it has to be shown that every single 'prime' k less than 271,129 is not a Sierpinski number, and to do that, some n must be found that makes k*2^n+1 prime.
Seventeen or Bust is working on the Sierpinski problem and the Prime Sierpinski Project is working on the 'prime' Sierpinski problem. The following k's remain for each project:
[u]Sierpinski problem[/u] [u][i]'prime'[/i] Sierpinski problem[/u]
10223 10223*
21181 22699*
22699 67607*
24737 79309
55459 79817
67607 90527
152267
156511
168451
222113
225931
237019
[b]* being tested by Seventeen or Bust[/b] Fortunately, the two projects combined their sieving efforts into a single file. Therefore, PrimeGrid's PSP sieve supports both projects.
What is sieving?
Sieving is the first step to prime finding. In general, a sieve separates wanted/desired elements from unwanted material using a tool such as a mesh, net or other filtration or distillation methods. The word "sift" derives from this term. (Wikipedia - Sieve)
In PrimeGrid's case, the desired elements ultimately are prime numbers and the unwanted material are composite numbers. Our tool of choice for PSP sieve is Geoff Reynolds' sr2sieve program. It eliminates possible candidates by removing numbers that have small factors. As this process is much faster than primality testing, it is good to thoroughly sieve a data set before primality testing.
Sieving removes many candidates at the beginning. However, the deeper the sieve goes, the slower the rate of removal, till eventually sieving removes candidates at the same rate as primality testing. This is sometimes referred to as "optimal depth". Primality testing is recommended at this point.
There are many factors that determine how much time and how deep to sieve. After sieving, all the remaining candidates must be primality tested to determine their "prime" status.
Additional Information
For more information about PSP sieve, please see these resources:
For more information about Sierpinski, Sierpinski number, and the Sierpinsk problem, please see these resources:
32 bit OS with 64 bit CPU
This is for those who are "driving with the hand brake active" (running a 32 bit OS on a 64 bit machine) ;) Wubi is a very nice tool that installs Ubuntu as a dual boot to your 64 bit machine. It's as simple as adding a program to Windows. You can even uninstall it like you would any other program. :)
Wubi - Ubuntu Installer
After getting 64 bit OS running on your machine, here's a link to ALL BOINC clients (including Linux x64): http://boinc.berkeley.edu/download_all.php If you are new to Linux and need help getting set up, let us know.
It really is simple. :)
Ubuntu has a power save feature that throttles the CPU frequency down to save power. It does not treat BOINC as an active program so will throttle down thus causing under-performance. For those downloading the latest Ubuntu 8.10, please follow these directions to make sure the frequency is not throttled down while BOINC is running:
1. In Ubuntu, right click the top menu bar
2. Select add to panel
3. Select "CPU Frequency Scaling Monitor"
4. Click add
This will add a processor icon to the top menu. Click on the icon and set to "Performance". This also allows you to see the CPU frequency.
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Is this the same sieve file from the December challenge?
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(...)
Ubuntu has a power save feature that throttles the CPU frequency down to save power. It does not treat BOINC as an active program so will throttle down thus causing under-performance. For those downloading the latest Ubuntu 8.10, please follow these directions to make sure the frequency is not throttled down while BOINC is running:
1. In Ubuntu, right click the top menu bar
2. Select add to panel
3. Select "CPU Frequency Scaling Monitor"
4. Click add
This will add a processor icon to the top menu. Click on the icon and set to "Performance". This also allows you to see the CPU frequency.
Or you paste this into your commandline and go ahead with an enter:
for i in `cat /proc/cpuinfo|grep processor|awk '{print $3}'`; do echo 0 > /sys/devices/system/cpu/cpu${i}/cpufreq/`cat /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor`/ignore_nice_load; done
That should do the trick and enable "More Power(tm)".
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Is this the same sieve file from the December challenge?
Yes, it has not changed since end of July 2008.
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Hey Roadrunner,
Where to paste this at? And do you need to do after every restart?
The cpu frequency scaling needs to be enabled after every restart..
Also what is more power, an Intel thing? I'm running AMD will this work for me?
John Galt 007, I ran a few PSP sieve on all my boxes and no nnew sieve file was downloaded..
Thanks, Jack
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http://stats.free-dc.org/cpidtagb.php?cpid=f8f5fddb02aba8e69218c01a64840e3a&theme=8&cols=1 |
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For "More Power" look here
And of course you have to give the command after every reboot (as said: in a console/on the commandline) - but who does boot his clients anyways? ;)
I am on RHEL 5 (or Fedora 10 on one host) - here cpuspeed is enabled as a service with the "ondemand" governor and i even undervolt my CPUs with acpi-cpufreq compiled with the patch from linux-phc.
I do not know how ubuntu handles services, but a
ln -snf /etc/init.d/cpuspeed /etc/rc3.d/S99cpuspeed
ln -snf /etc/init.d/cpuspeed /etc/rc[06].d/K00cpuspeed
on the console should also enable it for starting/stoping when booting/shuting down your system.
Of course you have to alter the cpuspeed to whatever the service is called in ubuntu.
Maybee you could - as in RHEL 5 - specifiy the governor to use in /etc/sysconfig/cpuspeed, but i am not familiar with ubuntu, e.g. in Gentoo this would be /etc/conf.d/cpuspeed i think. |
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Thanks for the answers...I won't have to start up the WUBI installs until the challenge, then...
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The more power reference went way over my head !! I miss the tool man.
I thought maybe it was to give a speed boost, now I realise that the cpu can only run at 100%.
Good luck in the challenge all!!
Jack
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http://stats.free-dc.org/cpidtagb.php?cpid=f8f5fddb02aba8e69218c01a64840e3a&theme=8&cols=1 |
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Yes, sieve file has not changed since end of July 2008.
Wouldn't it save bandwidth (and memory of people running) if new people downloaded a file that had previously sieved numbers taken out, as well as numbers that have since been prime tested? Is there a way to not make everyone re-download it if they have the older version, but still have new people get the smaller one? |
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Over at seventeen or bust sieve we're excited by the prospect of the challenge and look forward to the additional help. Just wondering if the PrimeGrid admins could post some before and after stats to show how much of an area has been sieved during this challenge?
Thanks again for your support! |
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I agree this is going to be an awesome Challenge!! Count me in on this one :)
Over at seventeen or bust sieve we're excited by the prospect of the challenge and look forward to the additional help. Just wondering if the PrimeGrid admins could post some before and after stats to show how much of an area has been sieved during this challenge?
Thanks again for your support!
That is a great question I also would love to have before and after stats although I think they do show some on the personal and team stats but maybe your looking for a little more, great idea anyhow so I support ya!
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John M. Johnson "Novex" |
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I agree this is going to be an awesome Challenge!! Count me in on this one :)
Uups! I thougth you never meet our challenge lol
Nice to meet you then .... :)
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Sysadm@Nbg
Member of Team Seti.Germany
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I agree this is going to be an awesome Challenge!! Count me in on this one :)
Uups! I thougth you never meet our challenge lol
Nice to meet you then .... :)
What!! I do almost all if not all of the Challenges I can if I can make them, granted I think I missed only 1 or 2. I even keep a text file of what rank or score my team and I get so I know what our participation is and such :P So I'm not new or anything by any means but it is a pleasure to meet you too :) Hope to see you at the event :)
When Tim sees this I hope he will challenge me on this event like we always do hehe but we shall see!!
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John M. Johnson "Novex" |
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When Tim sees this I hope he will challenge me on this event like we always do hehe but we shall see!!
Yeah, let's see if he'll find more primes than you while sieving *lol*
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There are only 10 kinds of people - those who understand binary and those who don't
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 TimVolunteer tester
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Joined: Jan 30 08
Posts: 419
ID: 18322
Credit: 1,676,220
RAC: 3,355
             
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When Tim sees this I hope he will challenge me on this event like we always do hehe but we shall see!!
I'm going to tan your ass again my friend.
No pressure. None at all.
Did I mention I've got the rats on steriods?
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It should be noted that in the newest Ubuntu release, 9.04, the powernowd bug is fixed, and the CPU runs at full speed automatically for active programs at any nice level. Also, BM gets updated to a newer (not newest, but at least no more red message when it starts) version. About time!
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There alway were before and after stats. So don't worry. |
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When Tim sees this I hope he will challenge me on this event like we always do hehe but we shall see!!
I'm going to tan your ass again my friend.
No pressure. None at all.
Did I mention I've got the rats on steriods?
Can't wait for it to start Tim!!! Say, what ever happened to that PM? hehe not that big of a deal but anyway this Challenge will be fun!!
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John M. Johnson "Novex" |
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Let's dance:D
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WILL CRUNCH for HAGGIS
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Let's dance:D
/Dances....with Tim's wife :P OOOH its on now right Tim :P hehe 45min to go@!@!
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John M. Johnson "Novex" |
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Good luck to all
Enjoy the challenge
From the U.K.
b.
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Member of The UK BOINC Team.
Join us here
 http://www.tiny.cc/UBT
http://bobtonson.page-visit.com
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JohnForum moderator
Project scientist
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Joined: Feb 21 06
Posts: 1560
ID: 2449
Credit: 357,929
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NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section to the left of the countdown clock.
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@Admins:
Any plan to fix the stats to show the correct numbers?
[Edit]... or did the rules change???[/edit]
;-) |
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WTF?
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work sent
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work is available for Prime Sierpinski Problem (Sieve)
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work available for the applications you have selected. Please check your settings on the web site.
There should be >200k WUs...
Besides: This particular client is only crunching with only one cpu from time to time, i haven't the least idea why. |
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WTF?
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work sent
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work is available for Prime Sierpinski Problem (Sieve)
Mi 29 Apr 2009 20:31:47 CEST|PrimeGrid|Message from server: No work available for the applications you have selected. Please check your settings on the web site.
There should be >200k WUs...
Besides: This particular client is only crunching with only one cpu from time to time, i haven't the least idea why.
Just give it time, I've got my 5 computers working on the work units right now, I had to update it a few times on each computer then soon you will get work units, it's just everyone else is trying to grab WU's too at the same time :)
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John M. Johnson "Novex" |
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Mine says this every now and then as well, but then 1 minute later gets new work just fine. (In fact, this just happened 3 minutes ago) Perhaps the server is just too busy at the moment to keep up? |
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@Admins:
Any plan to fix the stats to show the correct numbers?
[Edit]... or did the rules change???[/edit]
;-)
Something is definitely not right... I'm getting challenge points for work that was downloaded prior to the challenge starting. |
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RytisForum moderator
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Fixed, we had 1 hour offset becase of daylight savings time.
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Fixed, we had 1 hour offset becase of daylight savings time.
Great :) thanks |
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Where do you see the challenge points? (My apologies - this is the first challenge I've participated in) |
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Where do you see the challenge points? (My apologies - this is the first challenge I've participated in)
On the home page, underneath the clock on the top right corner, click on participants or teams
[edit] And welcome to the challenges by the way - Happy Crunching !!! [/edit] |
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Fixed, we had 1 hour offset becase of daylight savings time.
Hello Rytis,
did you only fix the individual stats?
The team stats look as strange as before ... |
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RytisForum moderator
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All stats look fine to me.
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JohnForum moderator
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Joined: Feb 21 06
Posts: 1560
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Fixed, we had 1 hour offset becase of daylight savings time.
Hello Rytis,
did you only fix the individual stats?
The team stats look as strange as before ...
The team stats appear corrected as well. The team individual scores match the team total scores...at least for the first 3 teams I checked. :)
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Fixed, we had 1 hour offset becase of daylight savings time.
Hello Rytis,
did you only fix the individual stats?
The team stats look as strange as before ...
The team stats appear corrected as well. The team individual scores match the team total scores...at least for the first 3 teams I checked. :)
Seems you´re right, graphs are now starting to make sense.
Sorry Rytis ;-) |
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wassup with that countdown-clock??? |
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wassup with that countdown-clock???
I don't see anything ?
/Lennart |
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wassup with that countdown-clock???
I don't see anything ?
/Lennart
forget it - i was still in countdown-mode.. |
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Maybe Frank is confused because during the challenge its actually a count-'up'-clock ;)
Or his local computer time is just wrong.
The challenge is running really nice so far. |
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30/04/2009 19:01:49|PrimeGrid|Message from server: Completed result psp_sr2sieve_23232750_0 refused: result already reported as success
30/04/2009 19:01:49|PrimeGrid|Message from server: Resent lost result psp_sr2sieve_22627196_1
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Hi Damien, this is not a problem.
Your client commits your results (and lots of them at the same time) and the server connection times out because it just takes too long for the server to commit all your results in the database. The client is recommitting all results after one minute, but the server already finished some of your WUs in the database.
Thats why the server returns the WU as already committed. You already got the credit for those WUs.
This 'lost result' is a similar problem. But you did not 'loose' anything. |
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 Mardur,
Thank you.
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JohnForum moderator
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Joined: Feb 21 06
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556T completed so far...that's on pace for 1P by the end of the Challenge!!!!!
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556T completed so far...that's on pace for 1P by the end of the Challenge!!!!!
With 3G per WU, that means about 185k WUs have been completed in 26 hours. Amazing!
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The same thing that happened on previous challenges has happened again:
I have the option of using a couple of PCs in the office. All of them run Win32 so I am using a LiveCD with a 64-bit Ubuntu on it (Dotsch/UX).
Now I have booted about 10 of them using this live CD and attached them all to the project.
However, on each Boinc update, all my WUs get "aborted by project" - even the ones that were running a second ago.
Unfortunately I only noticed that today, so I have lost about 480 core-hours so far (20 cores x 24 hours).
I then noticed that only one of them appeared in the my-computers list. It then occurred to me that they all have the same hostname (boinc), but I didn't think that the computer-id is exclusively related to the hostname.
Anyway, since changing the hostname on the fly messes up X I went to the command-line and detached the project from all PCs. I then changed the hostname and re-attached the box from the command-line.
Now, the weird thing is that of the 10 workstations, only 4 show up at the moment. I've had every workstation show up right after I attached the project, but they have miraculously disappeared and i do not doubt that all their work will be in vain, too.
It also seems that the 4 machines seem to vary. At first, I saw boinc07, boinc08, boinc10, boinc19 in the list, now it's boinc07, boinc08, boinc11, boinc19... and it should be boinc07, boinc08, boinc10, boinc11, boinc13, boinc14, boinc17, boinc19, boinc21 (and one just called boinc)
Can you tell me what else I'm supposed to do, I'm running out of ideas! And I'm also quite .. well... annoyed!
Edit: BTW it really can't be the hostname as I have multiple hosts that show up with the same hostname.
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Yeah I love the fact that about a day or a half a day because after it was counting down, which it started noon/1pm time here in Minnesota But after 12 hours of this, were already a day and a half into this, umm What is going on here omg. Seriously guess greatly disappointed.
NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section to the left of the countdown clock.
So I feel it is unfair for 1 to have to see that oh since it's still counting down yet it still counts the majority's like my self's Had I now waited Like I was told to by the mods and how other Challenge's have gone. which I didn'I then start I waited till noon which was 8 hours ago and it starts. And the clock goes from -15 secs to 2 min counting up. O.O then that post I quoted was put up. From John explaining some issues. This is horrible. I love helping but not when I work and put my 6 computers and more cores on the line and only then that they get put low as hell on the score list. that isn't fair at all for the majority of us that actually care about this challenge. Basicly a great majority started at least a half a day to a full day to get there scores. I feel there could have been many changes to help this but from what I hear, this happened from the last time, which I was at. There are plenty of ways to fix this. But who am I now that I"m saying that this is wrong. exploitative and sad.
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John M. Johnson "Novex" |
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Hi there John - perhaps I've had too much beer, but I've read and reread your post and I still can't make sense of it. What is the issue exactly? The challenge started on 4/29 at 2 PM EDT or 1 PM CDT and everything has gone smoothly as far as I can tell. Am I missing something here?
Ben
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Yes like you said it started 1pm central my time, but many still got points for turning in sieves before that. I have all faith in Rytis the mod, but the issues of how some got caught by me, hopfully getting credit before hand and lastly how the countdowns said today as the start and yea so some small print say something else It would have been nice to have the count down timer this morning up to 1pm before I had to take my dad to his doc apt. Whom I take care of, this isn't the type of stress I need. So Whatever happens now I am at the point of not caring. This isn't the first Challenge, this is like what how many. Thats all I am going to leave with since other then community members and PM's and enjoying this website is great, but the Challenges always bring stress in me as in the way that I can't do anything to help. Fix the bugs or have any suggestion other then I wish this was more Community and less ....I'll hold off on that last word. I'm sure there are at least 1 doct degree in computer sci that could help, a few in majors, and myself along with many many others have bachelors degree's to help yet I'm left in the cold like they are. So maybe these challenges are a test to the community on how much you are willing to put up with before you speak. Who knows, we will see. What is done and not done will answer about 16 of the PM's I've got of people ready to just leave. I don't want them to leave and told them no no don't leave, just do what makes you happy hear. Like I plan to do. So I guess we wait and see. They will make there own choices, I'll stay here until it gets too " where 1 person doing a sieve gets this much because we like him, and another gets this much junk because we hate him so give him less," It's not that yet here, but can you show me how far away it is from there with proof? Because I can show you how close it is to the far side of the ones who get what faster, higher, etc. But I won't take too much of your time. I'm off for the night I think, unless I log in to read, one thing about the Internet you learn to know about hate mail, it will always be out there no matter who you are. you may not get any because you don't know as many as others. But I'm sure I will have some. Hope not but that is all. :) Hope you well on your Challenge Ben Rhodes
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John M. Johnson "Novex" |
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The same thing that happened on previous challenges has happened again:
I have the option of using a couple of PCs in the office. All of them run Win32 so I am using a LiveCD with a 64-bit Ubuntu on it (Dotsch/UX).
Now I have booted about 10 of them using this live CD and attached them all to the project.
However, on each Boinc update, all my WUs get "aborted by project" - even the ones that were running a second ago.
Unfortunately I only noticed that today, so I have lost about 480 core-hours so far (20 cores x 24 hours).
I then noticed that only one of them appeared in the my-computers list. It then occurred to me that they all have the same hostname (boinc), but I didn't think that the computer-id is exclusively related to the hostname.
Anyway, since changing the hostname on the fly messes up X I went to the command-line and detached the project from all PCs. I then changed the hostname and re-attached the box from the command-line.
Now, the weird thing is that of the 10 workstations, only 4 show up at the moment. I've had every workstation show up right after I attached the project, but they have miraculously disappeared and i do not doubt that all their work will be in vain, too.
It also seems that the 4 machines seem to vary. At first, I saw boinc07, boinc08, boinc10, boinc19 in the list, now it's boinc07, boinc08, boinc11, boinc19... and it should be boinc07, boinc08, boinc10, boinc11, boinc13, boinc14, boinc17, boinc19, boinc21 (and one just called boinc)
Can you tell me what else I'm supposed to do, I'm running out of ideas! And I'm also quite .. well... annoyed!
Edit: BTW it really can't be the hostname as I have multiple hosts that show up with the same hostname.
I had a similar problem at the beginning of my first Challange (The Winter Solstice Challenge).
Using Wubi-Ubuntu64 all my hosts had the hostname "Ubuntu" - but only two have been "automatical merged" by the servers"
(>"aborted by project" -problem, same Wu sent to both hosts).
I realised that the allmost identical Hardware (main components) in combination with the identical hostname was the problem.
I changed the hostnames by editing the config-files manually.
- edit: /ect/hostname (gedit frozen, X messed up)
- logging off and relogging (gedit works again)
- edit: /ect/host (same hostname in line one and line two)
X works -hostname successfully changed
- restart System (Boinc recognizes the changed hostname)
I changed the hostnames of my other Hosts in the same way - works for me.
(running live CD may be different)
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John M., have you ever heard of paragraphs and sentence structure? :) It's next to impossible to understand your writings to non-native English speaker (like me). In any case, I'll respond to the questions I could understand.
The scoring in the beginning of the challenge was off by one hour. However, it was quickly fixed. The score gets recalculated at every stats update, so that one hour has never been counted in anymore. If you don't believe me, or have doubts - what can I do - but check BOINCstats charts and see how some people had a drop in the stats right after the fix was implemented. This shows that extra points have been deducted from them.
What the heck are you blabbering about people starting a day or half a day earlier to get the score? Get your facts straight. I can't do anything to help you if your clocks are running way off.
Now, about the hostnames issue. I don't think it's the hostname problem, you've probably had copied whole BOINC installation from one host to another. If you do that, you copy over host id and connection counter. When one of your hosts contacts server, connection counter gets increased, however, on other computers having the same host id (because it was copied over), the counter has not been increased, so BOINC sees it as a communication failure and trashes all WUs. The safe way to copy things from one computer to another is to exclude client_state.xml.
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John M., have you ever heard of paragraphs and sentence structure? :) It's next to impossible to understand your writings to non-native English speaker (like me). In any case, I'll respond to the questions I could understand.
The scoring in the beginning of the challenge was off by one hour. However, it was quickly fixed. The score gets recalculated at every stats update, so that one hour has never been counted in anymore. If you don't believe me, or have doubts - what can I do - but check BOINCstats charts and see how some people had a drop in the stats right after the fix was implemented. This shows that extra points have been deducted from them.
What the heck are you blabbering about people starting a day or half a day earlier to get the score? Get your facts straight. I can't do anything to help you if your clocks are running way off.
I think what John is trying to say is that he thinks some people got units prior to the actual start of the Challenge. This then gives them a leg up on the credits. I too am having difficulty but, from what I can make out of it, that is what I think he is trying to say.
At the end he also seems to be saying some people are getting more credit than others for similar work, and he has proof. I have no idea, I am just here for the challenge.
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Now, about the hostnames issue. I don't think it's the hostname problem, you've probably had copied whole BOINC installation from one host to another. If you do that, you copy over host id and connection counter. When one of your hosts contacts server, connection counter gets increased, however, on other computers having the same host id (because it was copied over), the counter has not been increased, so BOINC sees it as a communication failure and trashes all WUs. The safe way to copy things from one computer to another is to exclude client_state.xml.
I installed BOINC on both hosts with "Synaptic-Paketmanager" without any file-transfer between the hosts.
I found the old BOINC logfiles from December:
stdoutdae(PC1).old.txt (~2MB)
stdoutdae(PC2).old.txt (~2MB)
First PC was attached at 12-Dec-2008 23:24:05 MEZ
Second PC was attached at 13-Dec-2008 18:30:15 MEZ - and got the same "Computer ID: 90641" as the first.
Up to 13-Dec-2008 13:00:00 MEZ never crunched both at the same time for Primegrid - no problems
But at 13-Dec-2008 13:00:00 MEZ the Race - and the "Dance" starts.
17-Dec-2008 13:05:17 [PrimeGrid] Message from server: Resent lost result psp_sr2sieve_14127253_0
17-Dec-2008 13:05:17 [PrimeGrid] Message from server: Resent lost result psp_sr2sieve_14127243_0
...
17-Dec-2008 13:09:28 [PrimeGrid] Message from server: Result psp_sr2sieve_13406119_2 is no longer usable
17-Dec-2008 13:09:28 [PrimeGrid] Message from server: Result psp_sr2sieve_13895517_1 is no longer usable
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I think an old version of BOINC (which was available at that time) had a problem with the host names. What BOINC version are you running?
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I think an old version of BOINC (which was available at that time) had a problem with the host names. What BOINC version are you running?
I got 6.2.12 from "Synaptic-Paketmanager" |
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Excuse me - in this thread: CrunchingFamily=Siegfried Niklas
(In "The Winter Solstice Challenge" we used the "Spezial-Account" "CrunchingFamily"
- I logged in to look for my hosts and forgot to relogg to my standard Account "Siegfried Niklas" (real name) before posting.
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JohnForum moderator
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2 hours to go... over 1.1P completed so far!!!!!!!!!!!!!!!!!!!
WOW!
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2 hours to go... over 1.1P completed so far!!!!!!!!!!!!!!!!!!!
WOW!
Is that why I am getting this on my machines:
"5/1/2009 12:30:12 PM|PrimeGrid|Message from server: (reached per-CPU limit of 24 tasks)"
OR
"5/1/2009 12:04:48 PM|PrimeGrid|Message from server: No work is available for Prime Sierpinski Problem (Sieve)"
Seems a bit silly to me to have a limit during a Challenge. Isn't the whole point to crunch as many units as possible during the Challenge and THEN go back to the normal way. Also probably why I am dropping in the Challenge stats, hmmm.
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Is that why I am getting this on my machines:
"5/1/2009 12:30:12 PM|PrimeGrid|Message from server: (reached per-CPU limit of 24 tasks)"
This is normal to see during the start and end of the Challenges. It is adjusted throughout the duration of the Challenge...at the beginning to help spread WU's to as many users as possible...and at the end to help lower server load and minimize clean up.
24 tasks per core is about 6 hours worth of PSP sieve work for the fastest computers. Therefore, if no more work was to go out, then each core would have 6 hours of work left. However, as each task is returned, a new one is downloaded to reach the 24 task limit again. In essence, this does not lower ability to continue work as normal. It just means you can only have at most 24 tasks at any given time.
OR
"5/1/2009 12:04:48 PM|PrimeGrid|Message from server: No work is available for Prime Sierpinski Problem (Sieve)"
This too is normal to see during the Challenges. Work is available, it's just that when the client attempted to connect to the server, at that moment, the load was too high to handle the communication. The client backs off for 1 minute and usually is able to communicate the next attempt.
With 6 hours of work in cache, this should not cause any concern.
Seems a bit silly to me to have a limit during a Challenge. Isn't the whole point to crunch as many units as possible during the Challenge and THEN go back to the normal way. Also probably why I am dropping in the Challenge stats, hmmm.
As long as you have work in your cache, the above messages should not affect your crunching. I hope this helps.
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What an amasing challenge
Thank you all for participating
Hope we will continue any place, any time, any how ...
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Sysadm@Nbg
Member of Team Seti.Germany
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Well, an early, but I do not think premature congratulations to Seti Germany. +
WOW!!! What a great showing, that's some impressive fire power.
On a side note: Since the tasks began validating an hour early (now corrected) Does this mean they also stopped validating an hour early?
I only ask because The last batch I reported isn't showing yet, though I do not know if that is because of backlog. Just thought I would bring it up.
Great challenge all !
Well done ! |
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Congrats to SG from me too!
Pretty impressive mobilization effort, my respects.
Thanks to the PG team for a nearly "flawless" challenge
Until next time ;-) |
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1.5 million points! Wow! Congratulations to SETI.Germany.
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I don't understand .... when can we expect the final results? I haven't seen any changes in the stats since the update at 17:15 UTC ! |
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Maybe it is the same problem as applied to the start of the challenge: DST?
Anyways: I am crunching away the last pspSieve, shut down some hosts and shuffle over to ppsLLR the rest. |
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Thanks for your reply Siegfried.
The issue is, I don't want to (or rather I can't) install anything, including Wubi. So I'm stuck with LiveCDs, and CDs make persistent changes difficult. No, I don't have 10 USB-Sticks.
The BOINC version on Dotsch/UX 1.1 is 6.4.5, so it's not a terribly old one and certainly a pretty stable one.
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I'll add my congrats to all participants.
I'll also again ask about the stats and the last hour. I know my personal stats for the challenge haven't changed since the 17:15 update, and I know for sure that I returned some WU's in the 17:30-18:00 timeframe that didn't get added to those totals.
Mark |
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I'll add my congrats to all participants.
I'll also again ask about the stats and the last hour. I know my personal stats for the challenge haven't changed since the 17:15 update, and I know for sure that I returned some WU's in the 17:30-18:00 timeframe that didn't get added to those totals.
Mark
The EXACT SAME situation for me. I return 2 WUs in the last half hour. They do not show up the Challenge stats, but they have already been reported at BOINCstats.
WHY IS THERE COMPLETE SILENCE ON THIS ISSUE FROM THE ADMINS ???
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Don't worry, your not the only one here that spoke up about it. Think of it not as a rebellion, but as a community helping and asking questions and helping one another which is what these Challenges do, they bring us together and thats the point isn't it. To get the primes done, bring the community together as a team or as I like to say, it brings us together as One.
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RytisForum moderator
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WHY IS THERE COMPLETE SILENCE ON THIS ISSUE FROM THE ADMINS ???
Maybe because it was night in Europe? We don't really stay up 24/7, you know... :)
I am checking the data now, and if I am sure that some score was excluded or overgranted, challenge scores will be recalculated.
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Thanks Rytis for doing the work. I hope you had a good sleep and are right awake now ;)
We can wait for the final results.
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It was a hit for me, but it seems that the data really was incorrect. The problem was incorrect timestamp for the challenge start/end, because of the daylight savings time (I was always against it... and now I have to pay). It was totally my fault, and I appologize to participants and teams who have been affected by the mistake.
The updated stats are now live, please look into them and let me know if you think they are correct now. And big thanks to people who pointed this out to me (especially computerguy09 and fan13027, because I manually counted score for them and used it to check the published score). I am very sorry for the issue.
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As for my results/score, things looks about ok to me now (I didn´t count every WU :-) )
Thanks for the update, Rytis, and as for the issue itself:
---- shit happens ;-) ----
As long as you figure it out in the end and correct it, no problem (for me) |
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Rytis,
Thank you for all of your and your colleagues hard work.
Personnaly speaking, I can't get too enthused about these challenges as there is no way I will ever score even a single point (unless I buy a server farm or get a job as a sys admin).
That said, the team I joined did manage 11th place this time but I don't understand the points systen on this page.
Could you let me know how UK BOINC Team got 11 points, I'd assumed from the table that 11th place in a 2 day challenge would give 30 points?
Sorry for my ignorance and thanks again for the best project I've crunched for.
Pete. |
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That said, the team I joined did manage 11th place this time but I don't understand the points systen on this page.
Could you let me know how UK BOINC Team got 11 points, I'd assumed from the table that 11th place in a 2 day challenge would give 30 points?
Your team got those 11 points for 20th place in the Ides of March Challenge. The points for Showers to Flowers are not included yet, but you'll get the 30 points once they are included. ;)
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It was a hit for me, but it seems that the data really was incorrect. The problem was incorrect timestamp for the challenge start/end, because of the daylight savings time (I was always against it... and now I have to pay). It was totally my fault, and I appologize to participants and teams who have been affected by the mistake.
The updated stats are now live, please look into them and let me know if you think they are correct now. And big thanks to people who pointed this out to me (especially computerguy09 and fan13027, because I manually counted score for them and used it to check the published score). I am very sorry for the issue.
Rytis -- I didn't enter this challange (couldn't force myself out of bed at 4.00AM) but I have followed the message boards and seen a lot of people getting upset over relatively minor issues-- Yes- there did seem to be some problems but you have admitted to this and now are working to sort it out--
@ all the people complaining -- back off-- and give the admin a chance to sort it out--- I've been crunching here now for 7 months -- Rytis & John have always dealt straight and honest with me-- so give them a chance to fix it --
DoES
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Thanks to all for a great challenge. Especially to William Wallace, I thought you had me there until the corrected points were posted. I knew I dumped over 450 WUs between 10:45 and 11:00, but never saw them. So I am very happy to see the corrected finish.
And to any crunchers that think you need a server farm or be a sys admin, all my machines are in my dining room of a one bedroom apartment. And I took third of the participants. It is definitely a sacrifice, but one person, at home, can make a big difference.
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So there is hope for my P3's & Celerons ??????
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It was a hit for me, but it seems that the data really was incorrect. The problem was incorrect timestamp for the challenge start/end, because of the daylight savings time (I was always against it... and now I have to pay). It was totally my fault, and I appologize to participants and teams who have been affected by the mistake.
The updated stats are now live, please look into them and let me know if you think they are correct now. And big thanks to people who pointed this out to me (especially computerguy09 and fan13027, because I manually counted score for them and used it to check the published score). I am very sorry for the issue.
Thank you! Yes the scores look fine now.
I truly apologize if my previous post sounded too harsh, but you had posted in the BOINCstats forum at 18:08 UTC that corrected scores would be out in the next 15 minutes and prior to 19:00 UTC there were multiple responses (both here and there) that scores were still not correct. That is why when several hours had already passed with no response that I thought something strange was going on.
Congratulations to all teams and all participants on a great challenge. I am looking forward to June. |
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[quote]
@ all the people complaining -- back off-- and give the admin a chance to sort it out--- I've been crunching here now for 7 months -- Rytis & John have always dealt straight and honest with me-- so give them a chance to fix it --
DoES
Well said a little patience goes a long way. Looking forward to the next challenge.
Jack
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The results are Final!
What an incredible amount of work completed! Over 1169T was crunched in the 48 hours of the Challenge. Over 389K tasks were returned resulting in over 11.1M cobblestones awarded. PrimeGrid's overall (Challenge + regular work) daily record was set on the second day of the Challenge with over 7.7M cobblestones for a 24 hour period. Congratulations to everyone...this is a great accomplishment.
We are still mopping up all those factors - over 1500 found!!! Hopefully we'll see some prime blooms in the coming months. 260 teams and 2092 individuals participated in the Challenge.
The Challenge Points stats are official. Congratulations to SETI.Germany as the top team and AF>XTBA>XTC FRED as the top individual. Maybe some sleeping giants have been awoken. Remember, the top 30 places earn points for this Challenge.
There were stats blips at the beginning with DST (off by 1 hour) and at the end again DST (off by 1 hour). However, both have now been resolved. Our apologies for this.
Thank you again to everyone. We appreciate your participation and hope you had fun! We wish y'all a nice spring and look forward to seeing you at the next Challenge - PrimeGrid's Birthday/Summer Solstice Challenge - 12-21 June - 9 days on the Prime Sierpinski Problem LLR! This will be our first time to do PSP LLR as a Challenge and what a bruiser it's going to be. Start cooling your machines now. :)
Stats: Participants | Teams
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Thanks to all for a great challenge. Especially to William Wallace, I thought you had me there until the corrected points were posted. I knew I dumped over 450 WUs between 10:45 and 11:00, but never saw them. So I am very happy to see the corrected finish.
And to any crunchers that think you need a server farm or be a sys admin, all my machines are in my dining room of a one bedroom apartment. And I took third of the participants. It is definitely a sacrifice, but one person, at home, can make a big difference.
You have a dining room, I have computer rooms where I eat:)
Nice work on the 3rd place.
Outlnder is correct people, you don't have to be an admin or be hooked up with an institution. My farm is also home owned and operated, although due to unemployment I am reducing my farm considerably.
I'll be easier for you next time Outlnder:)
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WILL CRUNCH for HAGGIS
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Thx to all participants in this excellent challenge.
I really love these "battles" especially between the teams. :)
After loosing the last two challenges against the powerful BOINCStats crunchers... we are back!
And for WilliamWallace and outlnder, my systems are at home too :)
Bill for electricity is coming soon... let me see how many systems will survive this :-/
Special thanks to the project admins for the smooth challenge and the fast response to some errors. Great job as always!!
Cheers Jörg
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I really love these "battles" especially between the teams. :)
does this mean we can expect you to crunch for PST next time - as ULI did this time for SG? ROFLMAO..
After loosing the last two challenges against the powerful BOINCStats crunchers... we are back!
congrats to SG - have a nice sunny day enjoing it.
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congratulations to SG and FRED. |
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Thank you, it was a nice challenge . |
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I really love these "battles" especially between the teams. :)
does this mean we can expect you to crunch for PST next time - as ULI did this time for SG? ROFLMAO..
After loosing the last two challenges against the powerful BOINCStats crunchers... we are back!
congrats to SG - have a nice sunny day enjoing it.
Hrhrhr...
This was a good one!
But today the sun shines a little bit brighter for me :)
And UL1... hope he is still on our side next time!
Think we have an exciting year in this project...
See you next time
Joerg
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We are still mopping up all those factors - over 1500 found!!! Hopefully we'll see some prime blooms in the coming months.
So I found about 1/750th of those new factors :)
What candidate ranges are we sieving? I suppose we could have done more than 1500 PSPLLRs in these two days, based on recent runtimes. But we might be sieving much larger numbers that take longer to LLR tests.
Regards, Peter
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...you don't have to be an admin or be hooked up with an institution
Hi Outlnder & William, so where did you buy all of your hardware? And how much should I expect to pay to pick up a low spec but capable machine?
How much are your electricity bills?
And, more importantly, how on earth did you convince your significant others that its necessary? You must be 'silver tongued devils' to get away with turning your homes (or even a part of them) into farms!
As you can tell, I'm green with envy:)
Pete.
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...you don't have to be an admin or be hooked up with an institution
Hi Outlnder & William, so where did you buy all of your hardware? And how much should I expect to pay to pick up a low spec but capable machine?
How much are your electricity bills?
And, more importantly, how on earth did you convince your significant others that its necessary? You must be 'silver tongued devils' to get away with turning your homes (or even a part of them) into farms!
As you can tell, I'm green with envy:)
Pete.
Start small and slowly get to the point of a ranch. I have 17 here running at home. 3 are true quad cores, all but 2 of the rest are dual cores. I have an all electric home here just south of Wash DC and pay about $400 or so a month in electric bills. Now I also have a 3 story house so my computers are spread out on all 3 floors, although most are in the basement. Most do not have a monitor, keyboard or mouse hooked up to them, I access them remotely.
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...you don't have to be an admin or be hooked up with an institution
Hi Outlnder & William, so where did you buy all of your hardware? And how much should I expect to pay to pick up a low spec but capable machine?
How much are your electricity bills?
And, more importantly, how on earth did you convince your significant others that its necessary? You must be 'silver tongued devils' to get away with turning your homes (or even a part of them) into farms!
As you can tell, I'm green with envy:)
Pete.
Start small and slowly get to the point of a ranch. I have 17 here running at home. 3 are true quad cores, all but 2 of the rest are dual cores. I have an all electric home here just south of Wash DC and pay about $400 or so a month in electric bills. Now I also have a 3 story house so my computers are spread out on all 3 floors, although most are in the basement. Most do not have a monitor, keyboard or mouse hooked up to them, I access them remotely.
Thats the way I started back in October last year --- with a single duo core then the regional council I work for started throwing out old computers (P4's & Celerons) so I started collecting -- some work some don't -- then its a CPU from this one -- bit of ram from that one -- plug in a power cord and see what happens--
I also collected 4 Micronet switches being thrown out (all work) so I have room for 92 boxes on my farm-- Its turned into a great hobby -- as the operation of the local rubbish dump is one of my departments I have the staff put aside any computers -- I average about 3 per week (we are a small community)-- I have never spent a dollar so far on any boxes-- I have over 100 stacked up in one room waiting for a chance to get a look at them--
DoES
Power costs me around $200 per month all up for the house and 16 boxes--
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