Message boards : Number crunching : Why can't I get any work?
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m.mitch

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Message 14346 - Posted: 18 Jul 2006, 14:56:22 UTC - in response to Message 14345.  

I didn't get any either, and I am on 24/7....

Have NO idea why I cannot get ANY wu's. I am only running ONE SETI unit, and have suspended EAH for two days now, as I suspected LHC was going to put some up...

HELP!!

Dora


I have five PC's running full time Dora and only one of mine got any today, about 10. There's still over 14K available but I've got to many WU's from other projects. ;-(

Like HomeGnome said, c'est la vie!




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Profile Ocean Archer
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Message 14349 - Posted: 18 Jul 2006, 15:28:18 UTC

Six machines here, but no joy with respect to (WRT) any new work. Guess I musta missed the window ....


If I've lived this long, I've gotta be that old
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Andreas

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Message 14350 - Posted: 18 Jul 2006, 15:30:58 UTC

As is customary, I didn't get any this time either.
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Profile [B^S] Dora

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Message 14353 - Posted: 18 Jul 2006, 16:15:31 UTC

Maybe I should send them some of my brownies ;-)



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Profile Steve Cressman
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Message 14354 - Posted: 18 Jul 2006, 16:23:19 UTC
Last modified: 18 Jul 2006, 16:27:52 UTC

That makes four or five batches now that I did not get to share in the work.

Something really needs to be done by the project to create a more fair distribution of work since the greedy ones here never learned to share. My computer is always connected and asks for work many, many, times a day but they get snapped up between deferals. The work would get done much faster if all the connected computers got some work instead of just a few computers getting large amounts that then sits in their cache for a few days.

Many hands light work makes.

If that does not make sense to you then maybe this will.
Suppose you needed a ditch dug and you had to do it by yourself with one shovel. It would take a long time. But if you had 20 people with 20 shovels it would be done almost right away.

The whole point behind distributed computing is to share the work amongst many computers.

Another thing, why do you think the default setting for the cache is only 0.1 day?
98SE XP2500+ @ 2.1 GHz Boinc v5.8.8
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Adam23

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Message 14355 - Posted: 18 Jul 2006, 16:46:50 UTC

Looks delicious, Dora :) Send them to CERN and you will get some WU for sure :D
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MRAO

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Message 14356 - Posted: 18 Jul 2006, 17:08:17 UTC - in response to Message 14353.  
Last modified: 18 Jul 2006, 17:09:29 UTC

Maybe I should send them some of my brownies ;-)


Mmmmm. I like the idea of barter for WUs, seems to be about the only way some of us will get any. Let me offer something to help wash the cookies down with. Mike
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Profile [B^S] Gamma^Ray

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Message 14357 - Posted: 18 Jul 2006, 17:39:56 UTC

I tend to agree with Steve on this one. Unless they limit the amount of work units distributed to everyone, Then it seems to me that as usual, The lions share of them will always go to the "Corporate Crunchers" , And whats left over goes to the lucky few of us that happen to get the crumbs.


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Dan V

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Message 14358 - Posted: 18 Jul 2006, 17:46:52 UTC - in response to Message 14350.  

yep

As is customary, I didn't get any this time either.

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Profile John Hunt

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Message 14359 - Posted: 18 Jul 2006, 17:56:07 UTC


I have one machine running here 24/7. Cache is set at 0.1 days.

Luckily I received (and returned, completed) three WUs today.

Good job I have other projects to keep me busy!



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Profile [B^S] Dora

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Message 14363 - Posted: 19 Jul 2006, 0:00:32 UTC

Okey Doke...

Waxing analytically for a moment, I found the below on one of the About LHC pages...

So my question is, do I have a processor that LHC does not trust? I know I am slow, old, etc., and this may be a logical reason for not gettign work units. Or it could just be that I am VERY unlucky, or maybe it is a cache thing, so I am downsizing mine again just to see what happens. I will try .4, because I think that is what it was set at when I did get some stuff...

Any thoughts??

D

...Besides helping build the LHC, LHC@home is helping to provide some fundamental insights into the challenges of distributed computing. Both with LHC@home, and with an in-house precursor called CPSS, it was discovered that different processors can produce sometimes markedly different results. This is due to the ways that certain mathematical functions such as exponential and tangent handle rounding errors on different processors. The lack of an internationally accepted standard for this, combined with the often chaotic nature of the particle orbits in the SixTrack simulations, which tend to amplify even the smallest differences, can produce significantly different results on different computers. Although initially perceived as a setback, this problem can be dealt with using newly developed function libraries from a group at the Ecole Nationale Sup´┐Żrieure in Lyon. The result also provides a potentially important insight for those currently developing applications for Grid computing, since ultimately these will also have to run on a wide range of computers...

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Gaspode the UnDressed

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Message 14370 - Posted: 19 Jul 2006, 5:27:55 UTC - in response to Message 14363.  

Okey Doke...

Waxing analytically for a moment, I found the below on one of the About LHC pages...

So my question is, do I have a processor that LHC does not trust? I know I am slow, old, etc., and this may be a logical reason for not gettign work units. Or it could just be that I am VERY unlucky, or maybe it is a cache thing, so I am downsizing mine again just to see what happens. I will try .4, because I think that is what it was set at when I did get some stuff...

Any thoughts??

D


The libraries referred to in the extract you found have done a very good job of standardising results across processors. If your processor is untrusted then you'll get a message in your output file to the effect of 'There was work available for other platforms'. This is the sort of message you'd see if you had a Mac, for example.

If you're processor is just turning in bad results then you'd never get any credit. By degrees your 'Maximum daily WU quota per CPU' setting (listed against each computer) would creep down to zero, and you'd get 'Quota exceeded'messages.

If all you're seeing is 'No work from project' then you're being unlucky. Blame the crunchers with seven day caches for sucking the well dry before you get to it.

Gaspode the UnDressed
http://www.littlevale.co.uk
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Profile [B^S] Dora

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Message 14373 - Posted: 20 Jul 2006, 0:52:37 UTC

Yeah!

I think they liked my brownies ;-) I got some work!



Thanks!!

D
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Lessa

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Message 14385 - Posted: 20 Jul 2006, 21:24:35 UTC

Is there any particular time I could be more likely to "get lucky" and get some work, or is it entirely random? If it would help to get up early, for example, I may do so once in a while.
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Profile Jack H

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Message 14386 - Posted: 20 Jul 2006, 23:08:40 UTC

There is new work when there is no work in progress. With little thing nearly.
Therefore, no moment of day very precise. To be connected all the time and hope manager communicates with LHC at the good moment. There is work only a few minutes since some time!

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Profile Jack H

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Message 14387 - Posted: 20 Jul 2006, 23:08:59 UTC

There is new work when there is no work in progress. With little thing nearly.
Therefore, no moment of day very precise. To be connected all the time and hope manager communicates with LHC at the good moment. There is work only a few minutes since some time!

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Message 14392 - Posted: 21 Jul 2006, 9:38:27 UTC

Im getting crumbs of one or two very short work units every couple of days atm. The very small batches being released get snapped up in minutes. Hopefully another big run soon as im getting bored with so few little Wu's
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Message 14393 - Posted: 21 Jul 2006, 14:31:04 UTC

I guess all we can do is to stand ready, and hope our request for work hits the scheduler at the right moment. Until that happens, I guess all we can do is wait and wait ....


If I've lived this long, I've gotta be that old
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Profile John Hunt

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Message 14394 - Posted: 21 Jul 2006, 14:41:45 UTC


Plenty of other projects to keep us going ..........



Life is good.........


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Profile MAGIC Quantum Mechanic
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Message 14395 - Posted: 21 Jul 2006, 18:02:52 UTC

I have been getting quite a few the last 2 times on 2 of my pc's........but I guess my firewall has been stopping my fast pc from getting any and I just got lucky since they are now online 24/7 so the other 2 have lots of them to do (lots of sixtrack 4.67 that take less than an hour each)






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