This a volunteer computing project that uses Internet-connected computers to advance Particle and Accelerator Physics. Participate by downloading and running a free program on your computer. By default, you can run the classic LHC@home application Sixtrack, for simulations of accelerator physics, and help researchers at CERN to improve the LHC.
Please note that some of the applications on LHC@home requre Virtual Box to be installed. Please visit the LHC@home information site for more information. If you have any problems or questions please visit the Message Boards, Questions and Answers and FAQ.
CMS@Home -- ongoing problems
Sorry that the CMS@Home HTCondor server is still playing up. Again over the weekend it refused to serve jobs even though plenty were available. Together with Federica we've decided not to inject another workflow this week, to let if "fail hard" again so that she can investigate which ClassAd preferences are not being met.
So, you will probably see the number of running jobs falling, and the number of errors increasing, in the next few days. Please feel free to set No New Tasks in that case. I won't, so that there is still some pressure for jobs on the server. I've also asked Laurence if I can run the CMS@Home VM outside of BOINC, to get around the quota back-off problem.
19 Feb 2020, 14:07:10 UTC · Discuss
CMS@Home up again
OK, jobs are available again. Sorry for the long delay. Remember, I'm only the front-man for a larger crew, so any downstream delays percolate up to my response. Hopefully this will remain good for some time, but I still don't understand why the condor server occasionally refuses to send out jobs in a timely manner.
12 Feb 2020, 11:14:38 UTC · Discuss
CMS@Home accidentally shut down -- Please set No New Tasks
We need to upgrade the CMS@Home WMAgent before Thursday, so I tried to set the workflows to drain down. Unfortunately, I misunderstood the batch states and killed off most of them instead. :-(. There's one still left with about 200 jobs, so that won't last long.
Please set your CMS projects to No New Tasks to avoid getting lots of computation errors. I'll let you know when the upgrade is done and jobs are flowing again.
10 Feb 2020, 15:33:39 UTC · Discuss
Server outage - uploads failing
Due to a network problem in the CERN computer centre early Thursday morning, our BOINC servers have lost access to a storage cluster. Hence uploads are failing and access to web pages as well. Hopefully this should be fixed soon.
23 Jan 2020, 7:31:25 UTC · Discuss
CMS@Home disruption this week
It appears that a database intervention at CERN went badly, leaving our data tables empty and us not being able to submit new CMS@Home jobs. Advice is that it will take several days to recover -- and as well as that some of the major players are in the USA, which has holidays for the rest of this week. I'll keep an eye on it, but I'm doubtful we'll be running again this week. Sorry 'bout that!
27 Nov 2019, 8:21:06 UTC · Discuss