http://milkyway.cs.rpi.edu/milkyway_cgi/cgi MilkyWay@Home

Funding

Funded through a grant from the National Science Foundation (NSF). Milkway@home is funded through a grant from the National Science Foundation (NSF). Any opinions, findings, and conclusions or recommendtions expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.

Individual grants are listed on the information page.


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Voyager in books. Explorer by nature. Scientist by profession.

News

Fix for stderr.txt Truncation and Validation Errors
Hey Everyone,

BOINC has released a new version of the BOINC client (7.6.6) which fixes a known bug causing ~3% validation errors on MilkyWay@home and other projects. Please update your clients soon to fix this issue. For more info please see my thread in number crunching here.

Jake W.
23 Jul 2015, 12:49:42 UTC · Comment


Nbody Status Update
Hey All,

Just a quick update on the status of Nbody. I discovered that the hanging that people were experiencing were due to the Newton Raphson root finding algorithm which would get stuck in an infinite loop. After looking for why this occurred for sometime, I decided to switch to a bisection method which is insured not to get stuck.

The slow nature of the initialization of the plummer was found to be an error in the calculation of one of the limits of integration in a crucial integral that was being calculated. What a time it was finding that! With that limit fixed, it seems that the initialization takes a few seconds!

I am currently unit testing the code and hopefully should get a lovely new version in a couple of weeks.

Cheers,
Sidd
25 Jun 2015, 16:28:41 UTC · Comment


Updates
Hey all,

Jake Weiss and I will be making fairly regular updates on the status of the project under the Application Code Discussion part of the forum.


Cheers,
Sidd
25 Jun 2015, 15:59:12 UTC · Comment


server issues
Hey all,

We are currently having a few issues with the server. Everything seems to be up and running yet no work units are being sent out. If any of you see any erroneous behavior on your end please let us know.

Thanks,
Sidd
3 Jun 2015, 18:47:39 UTC · Comment


Server Outage Today
Hey Everyone,

I was just informed by the admins in the server room on campus that they will be shutting down all of the servers for some schedules power outages at some point today. The server will be down overnight while they do some maintenance on the campus power systems.

Thank you for your continued support and understanding.

Jake W.

The server is back up. Sorry it took longer than expected to get it back online.
1 Jun 2015, 14:52:00 UTC · Comment


Windows Users-please abort Nbody tasks
Per Project Scientist Sidd:

It seems that it is only occurring for people with windows. The other platforms seem to be running ok. We had some trouble getting the binaries for windows in order to release, I am thinking something went wrong there, as none of the windows runs are passing. I took down the Windows version for now until I figure it all out.


If you are a Windows user please abort all N-body tasks and go into Preferences and uncheck "MilkyWay@Home N-Body Simulation" for now.

Thank you. 15 May 2015, 22:56:45 UTC · Comment

New Nbody Version 1.50
Hey all,

We have released a new version of Nbody. There are a few changes in this version. First and foremost, we changed the way dark and light matter in our model dwarf galaxy is assigned. Previously, we would have all the particles have the same mass and assign a certain number as dark or light, depending on the parameters of the simulation. This required a large number of bodies in order to get a good likelihood calculation. Now, we will have the same number of dark and light matter particles, but change the mass per light and dark matter particle in accordance to the parameters. This will allow us to lower the number of bodies from 50k to 20k, allowing for a much faster initialization and simulation run time.

Secondly, we have moved the assignment of dark and light matter from lua to c, which should also provide significant speed up in the run time.

Also, we fixed a number of bugs we found in the velocity assignment. All in all, a simulation should run at a fraction of the time previously. This will also hopefully fix the stalling issue some people have been having.

Finally, if you have any runs from the previously version, you can go ahead and abort them.

Since this is a new way of doing things, there may be some unforeseen issues. So, if there are any bugs let us know!
12 May 2015, 23:31:44 UTC · Comment


New Nbody release tomorrow
Hey All,

I just wanted to let you know that we will be releasing a version of Nbody tomorrow. I will be more specific on the changes that have been made after releasing. However, this version should hopefully be much faster and fix some other bugs.
4 May 2015, 23:21:33 UTC · Comment


New Bitcoin Utopia Campaign
Hey All,

Bitcoin Utopia is holding another fundraising campaign for MilkyWay@home! Check it out:

http://www.bitcoinutopia.com/2014/07/milkywayhome/#.VTqEAic4l4u
24 Apr 2015, 18:00:22 UTC · Comment


MilkyWay@home Server Maintenance
Hey Everyone,

I will be running some simple updates and giving the server a quick reboot later today. Shouldn't cause any issues on you end, but if it does please let me know.

Jake W.
25 Mar 2015, 13:44:30 UTC · Comment


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