Message boards : News : New Student and QMML Project
Author | Message |
---|---|
Hello everyone and happy new year! | |
ID: 48605 | Rating: 0 | rate: / Reply Quote | |
Welcome on board, Dominik, and Die besten Wünsche für dieses neue Jahr. | |
ID: 48614 | Rating: 0 | rate: / Reply Quote | |
Thank you for the heads up and info. Always good to get an update. | |
ID: 48620 | Rating: 0 | rate: / Reply Quote | |
Welcome... herzliche Grüße auch aus Österreich! :) | |
ID: 48621 | Rating: 0 | rate: / Reply Quote | |
That's a very, very good news :) | |
ID: 48622 | Rating: 0 | rate: / Reply Quote | |
Hi Dominik. Very surprised to see the very large number of tasks you made available. I am very new to the project and my first couple of weeks, I wondered if ANY work was going to be made available. See that has changed.
Can you say what the distribution is in the 50,000 tasks you posted is? Are they all the same for expected compute load? Are some of them very simple calculations with quick completion times expected? Are some of them very long calculations? I am trying to figure out why my first ten or so tasks got 150-160 credits for 3500 seconds of compute time and the next batch got 20 credits for the same amount of compute time. The batch today got 6 or 7 credits for 2000 seconds of compute time. The credit awarded does not scale with compute time. Can you explain this discrepancy? | |
ID: 48625 | Rating: 0 | rate: / Reply Quote | |
I am trying to figure out why my first ten or so tasks got 150-160 credits for 3500 seconds of compute time and the next batch got 20 credits for the same amount of compute time. The batch today got 6 or 7 credits for 2000 seconds of compute time. The credit awarded does not scale with compute time. I will jump in and just offer the observation that a lot of people on a lot of projects ask the same question. It is related to how BOINC calculates credits, which I don't claim to understand. But the results are almost random, and there is probably nothing that GPUGrid can do about it. | |
ID: 48626 | Rating: 0 | rate: / Reply Quote | |
Well I am quite familiar with what we "setizens" refer to as "CreditScrew" but I was under the impression that GPUGrid.net was one of the projects that didn't utilize the BOINC CreditNew algorithm like Einstein@Home for instance. | |
ID: 48627 | Rating: 0 | rate: / Reply Quote | |
Hi all, and of course welcome to Dominik! | |
ID: 48630 | Rating: 0 | rate: / Reply Quote | |
Hi Dominik. Very surprised to see the very large number of tasks you made available. I am very new to the project and my first couple of weeks, I wondered if ANY work was going to be made available. See that has changed. We wanted to set everything up as smooth as possible because we knew the workload that was coming. So as Toni always said those WUs were experimental, wherefore we didn't want to release too much and instead try to adapt to the problems in the first place. Now to your question: The kind of quantum chemical simulation that is performed is always the same. The only thing that differs is the molecule species that is put in. The bigger the molecule, the longer the simulation takes. There are currently 150 different molecules with ascending size distributed in the 50.000 WUs, so I expect the last ones to take longer than the first ones i.e. The actual time is obviously heavily dependent on your system and threads, for the current ones the computation time seems to be on average about 25min. For some later ones in the distribution this time will scale up. Regarding the credit issue you and maybe others are experiencing, I am sorry that this is happening to you, but there is currently nothing I can do from my side and as Jim said I'm not sure if this is something we can target at all. Thanks for reporting this issue and for coming back to give it another try! | |
ID: 48631 | Rating: 0 | rate: / Reply Quote | |
Hi Toni and Dominik. Thanks for the info about the project using the "old" credit calculation mechanism. That is a GOOD THING! | |
ID: 48640 | Rating: 0 | rate: / Reply Quote | |
Hi Toni and Dominik. Thanks for the info about the project using the "old" credit calculation mechanism. That is a GOOD THING! | |
ID: 48641 | Rating: 0 | rate: / Reply Quote | |
Be careful of your terms. 'CreditNew' has been the default BOINC mechanism since 2010. I suspect this is what GPUGrid is using for these tasks: the support mechanisms for 'even older credit' have been removed from the codebase. | |
ID: 48644 | Rating: 0 | rate: / Reply Quote | |
Hi Richard, thanks for the input. I just joined so don't know the history of GPUGrid.net. | |
ID: 48645 | Rating: 0 | rate: / Reply Quote | |
Credit for the CPU tasks here is even pretty low for creditnew. | |
ID: 48648 | Rating: 0 | rate: / Reply Quote | |
Message boards : News : New Student and QMML Project