This a research 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.
Many queued tasks - server status page erratic
Due to the very high number of queued Sixtrack tasks, we have enabled 4 load-balanced scheduler/feeder servers to handle the demand. (Our bottleneck is the database, but several schedulers can cache more tasks to be dispatched.)
Our server status page does not currently show in real time the daemon status on remote servers. Hence the server status page may indicate that server processes like feeder on boincai12 is down, while it is ok.
Please also be patient if you are not getting tasks for your preferred application quickly enough. After a few retries, there will be some tasks. Thanks for your understanding and happy crunching!
21 Aug 2019, 11:41:17 UTC · Discuss
CMS@Home disruption, Monday 22nd July
I've had the following notice from CERN/CMS IT:
>> following the hypervisor reboot campaign, as announced by CERN IT here: https://cern.service-now.com/service-portal/view-outage.do?n=OTG0051185
>> the following VMs - under the CMS Production openstack project - will be rebooted on Monday July 22 (starting at 8:30am CERN time):
>> | vocms0267 | cern-geneva-b | cms-home
to which I replied:
> Thanks, Alan. vocms0267 runs the CMS@Home campaign. Should I warn the volunteers of the disruption, or will it be mainly transparent?
and received this reply:
Running jobs will fail because they won't be able to connect to the schedd condor_shadow process. So this will be the visible impact on the users. There will be also a short time window (until I get the agent restarted) where there will be no jobs pending in the condor pool.
So it might be worth it giving the users a heads up.
So, my recommendation is that you set "No New Tasks" for CMS@Home sometime Sunday afternoon, to let tasks complete before the 0830 CST restart. I'll let you know as soon as Alan informs me that vocm0267 is up and running again
17 Jul 2019, 13:14:12 UTC · Discuss
Native ATLAS and Theory applications require a CVMFS configuration update
Volunteers running ATLAS native and/or Theory native are kindly asked to update their local CVMFS configuration. Please see the following post for the details.
5 Jul 2019, 8:06:20 UTC · Discuss
Our BOINC servers were unavailable from 13:45 to 15:30 CET this afternoon due to a problem with a shared storage cluster. This explains possible download/upload errors from your clients.
Sorry for the trouble and happy crunching.
26 Jun 2019, 13:53:13 UTC · Discuss
killing extremely long SixTrack tasks
we had to kill ~10k WUs named: