What is LHC@home?

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.

Other LHC@home simulations that utilizes virtualization to run applications for Theory and experiment simulations for ATLAS, CMS and LHCb are also available.

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.

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User of the Day

User profile Profile White Mountain Wes
I am originally from the state of Vermont, but I have called New Hampshire home for over 20 years. After spending some time lurking in the ocean depths...


BOINC database downtime
The LHC@home database will be down for a while this morning, due to a network interruption in the CERN data centre. Hence scheduler requests and uploads will fail for a while.

Sorry for the trouble and happy crunching.
7 Sep 2020, 6:22:24 UTC · Discuss

Interruption to CMS@Home, Wednesday 15th July
We need to interrupt the CMS project tomorrow to deploy a new Workflow Management Agent. This means that jobs will not be available from sometime tonight. We recommend that you set your CMS machines to No New Tasks as soon as possible, to avoid tasks terminating with an error if a job can't be fetched.
We anticipate jobs will be available again late Wednesday (European time). I'll update this thread when it is OK to proceed.
14 Jul 2020, 13:19:28 UTC · Discuss

CMS job rundown
We need to do some tests of a patch to fix a bug that's been plaguing us for some time. To this end, I am letting the job queues drain, so there will be an absence of CMS jobs -- perhaps as soon as tomorrow morning, depending on how we continue to recover from today's Oracle quota problem.
So, be prepared to set No New Tasks as soon as you see any sign of lack of jobs -- or sooner if you prefer.
I don't know how long the testing will take, there are many factors at work (if the BOINC server sees that there are no jobs available, it will stop sending tasks; that will mean it takes longer for each test batch to be recognised and start serving jobs).
1 Jul 2020, 17:51:10 UTC · Discuss

Downtime Saturday
The database underlying LHC@home will be down on Saturday 27th of June due to an upgrade of a DB storage rack.

Hence LHC@home BOINC services will be unavailable for a good part of the day. (Est 5:30-12:30 UTC)

So your BOINC client connections to our servers are likely to fail on Saturday.

Thanks and happy crunching!
25 Jun 2020, 9:11:49 UTC · Discuss

Server outage Wednesday
Due to a failure of a database storage system, a number of database services at CERN failed on Wednesday afternoon. The LHC@home servers were affected as well, as the BOINC database was unavailable and requests timed out.

Sorry for the trouble and happy crunching!
27 May 2020, 17:59:14 UTC · Discuss

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