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New MilkyWay@Home Developer
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Author | Message |
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Send message Joined: 21 Aug 18 Posts: 59 Credit: 5,350,675 RAC: 0 |
Hello all, My name is Eric Mendelsohn, and I am a new developer working on the code for MilkyWay@Home. I am currently working on testing the impact of several parameters implicit within the N-body integrator used in MilkyWay@Home. I am also working on adding new gravitational potential models for the simulated bulge, disk, and halo of the Milky Way Galaxy. If you have any questions involving N-body, I will do my best to answer them as accurately as possible. Thank you for your support! |
Send message Joined: 4 Jul 09 Posts: 98 Credit: 17,390,949 RAC: 1,251 |
Eric Welcome aboard !!! I am looking forward to your efforts to improve the MilkyWay Project. A lot of the volunteer crunchers out here have been with the project for years. We are committed to the project and have weathered a few storms and hick ups. Please be as frequent as you can be with news and updates as they are always appreciated. I understand that in code development you can't test every platform, but the more you can debug an application version before release the less pain we have out here. Again welcome aboard Bill F Dallas TX In October of 1969 I took an oath to support and defend the Constitution of the United States against all enemies, foreign and domestic; There was no expiration date. |
Send message Joined: 14 Jun 18 Posts: 4 Credit: 332,789 RAC: 0 |
Have had bad luck with nbody WUs. My latest, which right now BOINC shows as using 2 cores, has actually started to *increment* (after running OK almost 3 hours) the Remaining time field. Previously, large nbody WUs were getting stuck and showing no processing at all. Modfits have been running normally with no errors on win7 and Lubuntu linux with linux boinc. I'm going to abort it and stop downloading new MWAH nbody tasks. I reported previous nbody stalls to Sid but never heard anything back. HTH |
Send message Joined: 5 Sep 08 Posts: 28 Credit: 245,585,043 RAC: 0 |
A hearty welcome Eric!! I have not been been here for a bit due to frequent problems with the project. I saw there were new wu's so I moved 4 machines here to give them a bit of a go. So far I have had no problems with Win10 or Linux. Cheers and good luck to you. |
Send message Joined: 28 Jun 17 Posts: 4 Credit: 20,279,165 RAC: 0 |
Welcome. I have have posted this some time ago but I'll say it again. It would be much appreciated if this project wold have an yearly activity rapport (as a 10 page PDF (ex:1 best contributors and best teams 2 what we have simulated and what observations we have extracted 3 observations vs simulations 4 limitation of our simulations 5 sponsors and gratitude etc)) so that us the crunchers would have an idea of the results of our compute time. thank you. Much appreciate if you do not ignore this post. |
Send message Joined: 9 Jul 17 Posts: 100 Credit: 16,967,906 RAC: 0 |
A 10 page report? I think a few lines of how things are going four times a year is quite enough. There are usually no real scientific conclusions that can be drawn until the project is complete. |
Send message Joined: 28 Jun 17 Posts: 4 Credit: 20,279,165 RAC: 0 |
Anything is better then nothing. Well We are volunteers.. that doesn't mean that we do not have costs with maintenance and electricity... What we ask is a bit of respect in return. nothing more. |
Send message Joined: 9 Jul 17 Posts: 100 Credit: 16,967,906 RAC: 0 |
I agree. Too many projects ignore the crunchers entirely. We need to know that someone is alive at the other end, looking at the data. Beyond that, I don't need much until the results are ready. Then, a link to the publication or other results would be in order. |
Send message Joined: 13 Nov 17 Posts: 4 Credit: 3,239,591 RAC: 0 |
Currently, periodic angle parameters θ and φ are not allowed to wrap from 3.14 to 0 You mean to tell me: that after all this time: all you had to do was allow the angle to roll out to 3.15 by performing a quick 0'ing of any run attempted above Pi? Quite possibly more complex to implement: but it would have solved so many N-Body Lockups wouldn't it? |
Send message Joined: 15 Dec 09 Posts: 12 Credit: 1,407,921,436 RAC: 0 |
Not having any problems with it taking 14 threads and 4 ati wu running concurrently. |
Send message Joined: 25 Feb 13 Posts: 580 Credit: 94,200,158 RAC: 0 |
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Send message Joined: 10 Feb 09 Posts: 52 Credit: 16,291,993 RAC: 0 |
Well done!! |
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