Recently I’ve stumbled upon the terms citizen science and citizen cyberscience. The last term was apparently invented by Shuttleworth Fellow Francois Grey as a label for BOINC-based distributed computing projects like seti@home, folding@home and his own lhc@home. Grey is also behind the Citizen Cyberscience Centre in Geneva - on the web pages of which there’s […]
Author Archives: admin
CERN School of Computing 2011 was… awesome
August 19, 2011 – 10:24 am
As exemplified on the pictures above (from the photo gallery of one of the students), CERN School of Computing includes a good deal of extracurricular activities. Which probably goes a long way in explaining the good and humorous atmosphere in the classroom.
Having spent a lot of energy preparing the exercise with the great CSC team, […]
CERN School of Computing 2011 - Exercise 2
July 7, 2011 – 2:53 pm
In this exercise we’ll solve the same assignment as in exercise 1, but using a prepackaged GridPilot application.
Download and install GridPilot
Start GridPilot and answer the initial questions - enable only the computing system “GridFactory” and set the submission host to gridfactory.nbi.dk
Import the app “ttbar_exercise”
Select the application/dataset “ttbar_exercise-100k-events” and click “Run”
Select the application/dataset “ttbar_exercise-merge” and click […]
CERN School of Computing 2011 - Exercise 1
July 7, 2011 – 2:53 pm
Exercise 1: LHC Monte Carlo event generation and analysis
One of the final plots.
This exercise was created for the 2011 CERN CERN School of Computing, hosted by the Niels Bohr Institute, University of Copenhagen.
Credits: physics content of this exercise by Jørgen Beck Hansen from the Niels Bohr Institute.
Assignment: Generate 500′000 LHC t-tbar events with PYTHIA and […]
SSL/certificates ok again.
May 16, 2011 – 1:05 pm
I’ve updated the CA certificates on the public GridFactory servers and their attached worker nodes and made new versions of the software with new CA certificates available for download.
SSL trouble - NorduGrid CA certificate expired 12/5, 12:00
May 15, 2011 – 2:59 pm
As the title says, there’s trouble.
Since I’ve not updated neither the servers nor the software, the GridFactory servers will not trust any NorduGrid client or certificates including their own - so they are effectively down - and also the software is useless until I get things upgraded.
Sorry for any incovenience.
Public beta!
May 9, 2011 – 10:28 am
Dear grid warriors: more tools are now available to assist you in your battles. The GridFactory software including GridPilot is now publicly available for download. Please take it for a spin and report back - either by commenting on the pages of this site, or by email to gridfactory@gridfactory.org.
Good luck!
CERN/ATLAS data processing on grids and GridFactory
May 7, 2011 – 6:48 pm
In this post I’ll report on running the application “mc09_7TeV.107691….” from the GridPilot app store. In the case of NorduGrid and WLCG, the ATLAS software is preinstalled on the resources. In the case of GridFactory, the jobs run inside a CernVM appliance with ATLAS software loaded through the AFS network file system. The input dataset […]
CERN/ATLAS Monte Carlo simulation on grids and clouds
May 3, 2011 – 11:53 pm
In previous posts we saw that I/O bound jobs ran ~3 faster on standard SATA disks than on network file systems and block devices (GPFS, NFS, EBS). This post reports on CPU bound jobs. I ran standard ATLAS Monte Carlo simulation on both grid and cloud resources: imported the ATLAS simulation app and ran […]
CERN/ATLAS boildown on clouds
April 15, 2011 – 10:32 am
In this post, I’ll take a look at some more runs of the “atlas_d3pd_boildown” application available in the GridPilot app store. The difference w.r.t. the runs described in a previous post is that this time I ran on cloud as opposed to grid resources. On dedicated hardware and on two public clouds, Amazon’s EC2 […]