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vLHCathome news - Sun, 06/28/2015 - 06:57
Congratulations and thanks to all our volunteers for helping CERN to reach the extremely impressive total of 2 Trillion events successfully simulated on our project.

When we passed our 1st trillion events in 2013, CERN published the following story on its Web site, and it still makes excellent reading:

Greetings to all from the T4T Team
Categories: vLHCathome news

New application version - 1.37

Atlas news - Wed, 06/24/2015 - 11:49
Dear All,

In the next hour a new application version for all platforms will be released.

The updates in this version are:

--New vboxwrapper version.
--Changes in the vbox_job.xml

The image will remain the same as in the old version.

Your inputs are important,
Please let us know if you are having problems.

Thank you all!
Categories: Atlas news

New beta app (DataBridge): Tests over, please stop!

vLHCathome news - Fri, 06/19/2015 - 11:37
Thanks to all who tested the new DataBridge system. Tests are now completed and we have no more MCPlots jobs in the DataBridge queue, so remaining beta app tasks will run idle VM's which is wasteful.


Ben and team
Categories: vLHCathome news

Maintenance starting June 18, 10:30 CET

Atlas news - Wed, 06/17/2015 - 19:12
Dear all,

There will be a maintenance operation to get a separate NFS
server VM for ATLAS and Sixtrack tomorrow at 10:30 CET.

We will take care of starting and stopping BOINC. Normally this should
take less than 30 minutes (time to change a DNS alias.)

Categories: Atlas news

Brief Interruption, Thursday 18th June,2015

Sixtrack news - Wed, 06/17/2015 - 18:22
There will be a hopefully brief interruption to the service tomorrow
Thursday at 10:30 CST to provide separate NFS servers for SixTrack
and Atlas. The WWW pages should still be accessible and a further
message will be posted when the operation is complete. Eric and Nils.
Categories: Sixtrack news

Issues with server infrastructure

Atlas news - Thu, 06/11/2015 - 11:49
Dear volunteers,

CERN has issues with part of the infrastructure, serving the ATLAS@Home disk space. One of the file servers is unreachable, which affects the WU processing.

Sorry for the inconvenience,

Categories: Atlas news

Project down due to a server issue

Sixtrack news - Thu, 06/11/2015 - 11:42
Due to a problem with an NFS server backend at CERN, the Sixtrack and ATLAS BOINC projects are down. A fix is underway.
Categories: Sixtrack news

Status of W boson simulation campaign

Atlas news - Mon, 06/08/2015 - 17:08
Dear volunteers,

As of today 40% of the initial campaign of W boson simulation has been completed. The first sample of the campaign contained 80.000 WUs. Thanks to the many volunteers a bit of over 7.000 Wus are concurrently processed; the total of completed WUs is a bit over 30.000.

many thanks!
Categories: Atlas news

HostID 10137504 user aqvario

Sixtrack news - Sat, 06/06/2015 - 16:12
HostID 10137504 owner aqvario.
I set the max_results_day to -1; locking the stable door
after the horse has bolted. For some reason I cannot read the
messages I read this morning on this topic. Thanks for the
help and the Google translation. Eric.
Categories: Sixtrack news

About new WUs (since v1.35)

Atlas news - Wed, 06/03/2015 - 12:15
Dear all,

The new bunch of WUs released a couple of days ago with the new application are quite different than the previous ones which were submitted for some months.

Within previous WUs production of top quark within the ATLAS were simulated (you can have a look at our public web page : ). Within recent WUs, W boson decays within the ATLAS detector are simulated (we are preparing a detailed article to be posted on our public site).

As the W boson mass is 1/2 the mass of a top quark it produces much less activity in the detector through its decay. It is faster to simulate a W boson event than a top quark. As the number of events to be simulated per WU is fixed, each WU of a W boson takes less CPU cycles. That is less credit per WU for the newly released WUs.

I hope it helps volunteers understanding some the behaviours of the new bunch of WUs.

Thank you again for your help in the ATLAS simulation effort!
Categories: Atlas news

LHC has restarted !

Atlas news - Wed, 06/03/2015 - 11:51
Follow us on
Categories: Atlas news

New application version for Windows

Atlas news - Mon, 06/01/2015 - 14:09
Dear All,

A new application version (1.36) is now available for Windows only.

The new application version is tuned to the upcoming data taking of LHC at 13 TeV collisions.
A lot of changes have been done to the software and the workunits so there might be unexpected issues with the execution. Please, let us know if you observe problems or failures of the WUs.

Thank you all!
Categories: Atlas news

New application version

Atlas news - Sat, 05/30/2015 - 10:21
Dear All,

A new application version is now available.

The new application version is tuned to the upcoming data taking of LHC at 13 TeV collisions. A lot of changes have been done to the software and the workunits so there might be unexpected issues with the execution. Please, let us know if you observe problems or failures of the WUs. More news next week.

Thank you!
Categories: Atlas news

Updates on ATLAS@home project

Atlas news - Tue, 05/26/2015 - 21:48
Dear volunteers,

First of all we would like to warmly thank all the volunteers how have contributed to the ATLAS@home project; below a few news and prospects for the next weeks.

o The BOINC server is experiencing load issues since several days which are being addressed by CERN IT. It is hoped that a the situation will be back to normal in the next days.

o BOINC results have passed ATLAS validation. It took longer than expected for various reasons : a dedicated sophisticated procedure has been developed to ensure that statistically BOINC simulation does not introduce any bias, in the course of the validation procedure several issues were found in the validation tools themselves. Now we are happy to announce that BOINC is fully validated for ATLAS simulation.

o As you may know, the LHC is about to deliver collisions at an increased energy. We have stopped submitting WUs, waiting for the queue of tasks to drain. In the next days, a new version of the ATLAS simulation will be used and a campaign of simulation corresponding to the new accelerator conditions will be launched. We shall keep you informed!

o Taking advantage of the new simulation campaign, a updated version of the vboxwrapper will be introduced as well.

Again thank you to all of you for your contribution to the ATLAS simulation effort.

Categories: Atlas news

Upload server

Atlas news - Fri, 05/22/2015 - 14:10
Dear All,

In the past few days there were some load issues with the upload server and therefore it took some time for tasks to upload the results.

We handled this and it's working fine now.

Categories: Atlas news

Quorom of 5, wzero and Pentathlon

Sixtrack news - Sun, 05/17/2015 - 16:32
I am currently running a set of very important tests to try and
find the cause of a few numerical differences between different platforms
and executables. I could/would not do this usually but because of your efforts
during the Pentathlon I have a unique opportunity. Also keeps up the
workload and gives you all an opportunity to get credits.
These test are wzero with a quorum of 5.Thanks. Eric.
Categories: Sixtrack news


Sixtrack news - Sat, 05/16/2015 - 21:03
Please note that this may occur if you are also subscribed
to the LHC experiment projects ATLAS or CMS using vLHCathome.
A workround is to delete the remaining files yourself.
Categories: Sixtrack news

New news on the BOINC Pentathlon

Sixtrack news - Fri, 05/15/2015 - 22:36
Please look at the NEWS 15th May, 2015 for latest update
involving the BOINC Pentathlon. Eric.
Categories: Sixtrack news

News 15th May, 2015

Sixtrack news - Fri, 05/15/2015 - 22:34
As many of you know LHC@home has been selected to host
the Sprint event of the BOINC Pentathlon organised by
Seti.Germany. Information can be found at
The event starts at midnight and will last for three days.

This is rather exciting for us and will be a real test of
our BOINC server setup at CERN. Although this is the weekend
following Ascension my colleagues are making a big effort to
submit lots of work, and I am seeing a new record number of active WUs
every time I look. The latest number was over 270,000 and the Sprint
has not yet officially started.

We have done our best to be ready without making any last minute changes
and while this should be fun I must confess to being rather worried
about our infrastructure. We shall see.

We still have our problems, for a year now.

I am having great difficulties building new executables since Windows XP
was deprecated and I am now tring to switch to gfortran on Cygwin.
It would seem to be appropriate to use the free compiler on our
volunteer project.

We are seeing too many null/empty result files. While an empty result can
be valid if the initial conditions for tracking are invalid, I am hoping
to treat these results as invalid. These errors are making it extremely
difficult for me to track down the few real validated but wrong results.
I have seen at least one case where a segment violation occurred, a clear
error, but an empty result was returned. The problem does not seem to
be OS or hardware or case dependent.

I am also working on cleaning the database of ancient WUs. We had not
properly deprecated old versions of executables until very recently.

I am currently using boinctest/sixtracktest to try a SixTrack which will return the full results giving more functionality and also allowing a case to be automatically handled as a series of subcases.

Then we must finally get back MacOS executables, AVX support, etc

Still an enormous amount of production is being carried out successfully
thanks to your support.

I shall say no more until we see how it goes for the next three days. Eric.
Categories: Sixtrack news

New beta app: Theory simulations using DataBridge

vLHCathome news - Thu, 05/07/2015 - 14:44
A new version of the Theory simulations application is now available for users that allow test applications. The simulations running in the VM are similar to those in the regular Theory application, however the queue and job management to the VM is handled via the "Data Bridge" application layer that is a new and more flexible framework that is intended to replace the CoPilot application layer that has been used up to now.

Happy crunching!
Categories: vLHCathome news


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