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Posts by Sidd
Posts by Sidd
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1) Message boards : News : Nbody release v1.72 (Message 67826)
Posted 28 Sep 2018 by Sidd
Hey All,
I just released version 1.72 of nbody for linux and windows. Mac to follow soon. I have also put up some new runs. Please let me know if there are any issues.

Thank you for your continued support,
Sidd
2) Message boards : News : Nbody release 1.72 soon (Message 67823)
Posted 26 Sep 2018 by Sidd
I will be releasing a new version of the Nbody application within the next 24 hours. Its a minor change to our cost function, but an important one. Hopefully this version will converge to optimized values faster!

As always,
thank you for your continued support,
Sidd
3) Message boards : News : New nbody runs July 2 (Message 67717)
Posted 21 Aug 2018 by Sidd
Hey,

That seems a bit odd. I would go ahead and cancel it. It could be that the workunit got stuck somehow. I will look into why that is.

Thanks for letting us know,
Sidd
4) Message boards : News : New nbody runs July 2 (Message 67716)
Posted 21 Aug 2018 by Sidd
Hey,

There seems to be an issue with openmp and the newest versions of mac, in that it is seemingly not supported anymore. We have someone working on that and will hopefully have a multi-threaded mac application soon. We have a single threaded application, but there was an error in putting it out; we are also looking into that.

All in all, we are currently working on getting our mac users an Nbody binary, but it may take some time unfortunately.

Thank you for your support,
Sidd
5) Message boards : News : New nbody runs July 2 (Message 67646)
Posted 2 Jul 2018 by Sidd
Hey All,

I just put up some new nbody runs. They will be the first to run off the new version (v170). I waited some time to put these up so the queue would clear out of the old workunits.

Please let me know if anyone encounters any issues with these runs.

As always, thank you for you continuing support,
Sidd
6) Message boards : News : Nbody 1.70 release (Message 67645)
Posted 2 Jul 2018 by Sidd
Hey,

I believe those are the workunits that were in the queue. Running them is fine, as this version (170) is backward compatible with the previous(168).

I have just put up runs for the newest version. So, v170's will be showing up soon.

Thanks,
Sidd
7) Message boards : News : Nbody 1.70 release (Message 67635)
Posted 27 Jun 2018 by Sidd
Hey All,

I just released a new version of Nbody, v1.70. There were very minor but necessary changes. I am hoping the transition goes smoothly.

As always, please let us know if there are any issues.

Thank you for your continuing support,
Sidd
8) Message boards : News : Nbody 1.68 release (Message 67022)
Posted 1 Feb 2018 by Sidd
I believe I found the workunit that was from.

Because I added an entirely new calculation, there were some new parameters needed for future flexibility. Therefore, if you were to use the old parameter files on the new binary it would give that error. It seems for some reason, that workunit did exactly that, the binary being used is the nbody v168 but the workunit is from the v166 runs, using the v166 parameter files. Before releasing, I took down the older runs, and so I was not expecting the work units to do this, and for that I apologize.

Fortunately, this error would occur right at the beginning, before anything began to run so it will not cause any wasted computational time. If you have any v166 runs in your queue, you can go ahead and cancel them so they do not give this error.
9) Message boards : News : Nbody 1.68 release (Message 67020)
Posted 1 Feb 2018 by Sidd
Thanks for letting me know!! I'm checking it out right now.
10) Message boards : News : Nbody 1.68 release (Message 67017)
Posted 31 Jan 2018 by Sidd
Hi All,

A new version, v1.68, of nbody has just been released. I have not yet released the mac multi-threaded version (OpenMP). I will release this at a later date.

In this release we have added a new way of constraining the width of the stream. Previously, we were using a measure of the velocity dispersion in each histogram bin. This led us to fit our parameters quite well. Unfortunately, we found that this may not be the best method in the long run. I have added a measure of the beta coordinate dispersion which, from initial findings, will be (hopefully) easier to fit our parameters with.

As always, please let me know if there are issues.

Thank you all for your continuing support,
Sidd
11) Message boards : News : Validation Inconclusive Errors (Message 66946)
Posted 10 Jan 2018 by Sidd
Hi all,

Can you please list some of the workunits that are marked as inconclusive and unsent?


Thanks,
Sidd
12) Message boards : News : Validation Inconclusive Errors (Message 66933)
Posted 6 Jan 2018 by Sidd
Hi all,

There has been some reports of validation inconclusive issues occurring with the Nbody workunits. It seems to be isolated to the nbody app. I believe this coincided with a database issue on our end. I am working on resolving the issue.

Thank you for you patience and continued support,
Sidd
13) Message boards : News : Clearing the Queue (Message 66695)
Posted 18 Oct 2017 by Sidd
Hey All,

We will have to clear the workunit queue for both separation and nbody. This will cause many invalid workunits. We apologize for this, as this is the only way to clear the system for it to return to normal operation.


Thanks for your continued support,
Jake and Sidd
14) Message boards : News : nbody 1.66 release (Message 66676)
Posted 2 Oct 2017 by Sidd
Hey All,

I just released version 1.66 of Nbody. This version has a newer version of the likelihood comparison algorithm which is used when comparing our test histograms with the client-side simulations. With this update we are hoping to have much better convergence in our parameter searches.

As always, please let us know if there are any issues.
Thanks,
Sidd
15) Message boards : News : Server Maintenance (Message 66497)
Posted 30 Jun 2017 by Sidd
Hey All,

For some reason I am not getting any return results from the Nbody app. The validator went down over the weekend and caused a huge backlog in the queue. I think this may be the issue as we have had something similar before. I am going to cancel the workunits in the queue and let it refill. If you see anything strange in the next 24 hrs with nbody workunits this is the reason.

Sidd
16) Message boards : News : nbody 1.64 release for Mac (Message 66430)
Posted 11 May 2017 by Sidd
Hey All,

I just released the newest version of nbody, version 1.64, for Mac single and multi-threaded. Please let me know if there are any issues.

PLEASE NOTE: We only have one mac machine for building and testing, meaning I had to test the binaries on the same machine that I built them on. So please let me know if anything strange crashing is seen.

Thank you all for your continued support,
Sidd
17) Message boards : News : New Release 1.64 (Message 66425)
Posted 9 May 2017 by Sidd
Hey All,

The new versions of our apps are not compatible with the old versions which is why they error out right away. We did some maintenance to clear the queue so that the only workunits sent out are the new ones. But there are still some that are out there already. This should clear up in a day or two.

Thanks,
Sidd
18) Message boards : News : New Release 1.64 (Message 66410)
Posted 8 May 2017 by Sidd
Hey guys,

I just put up some runs for the new version, so let me know if there are any problems with those. As for the issues you guys have been reporting:

1. the antivirus problem I believe we have seen before. You probably have to make boinc an exception under your firewall.

2. The previous version of nbody is a bit incompatible with the new version, so there might be a few days where the old runs are finishing up. Though they should not error out, so you should still be getting credit for them.


As always, thanks,
Sidd
19) Message boards : News : New Release 1.64 (Message 66347)
Posted 3 May 2017 by Sidd
Hey All,

I am about to release a new version of nbody. This version has a number of updates that expands functionality. I will make a blog post describing these updates soon.

We do not have mac binaries this time around. We are working on getting those. We also do not have 32bit support on either linux or windows.

The system I built the linux binaries on was Ubuntu 14.04 so there is the distinct possibility that they may not run on systems older than this.

I will put up some runs after releasing. Please let me know if there are any problems.
20) Message boards : Number crunching : Always immediate segfault on MilkyWay@Home N-Body Simulation v1.62 (mt) (Message 65039)
Posted 17 Aug 2016 by Sidd
Hey,

Thanks for letting us know. I looked into it and it seems that this workunit ran successfully on other systems. However, on a couple of systems there was max disk usage exceeded errors. I am not sure about why that happened and am looking into it. I think perhaps this was the issue with yours but for some reason threw a different error. It might be due to the difference in operating systems, but I am not sure. I will continue looking into it.

If this continues with other workunits, please be sure to let us know,

Thanks,
Sidd


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