CAShome.pptVIP

BOINC workshop 2013 @Grenoble CAS@home Wenjing Wu wuwj@ Computer Center, Institute of High Energy Physics Chinese Academy of Sciences, Beijing * BOINC workshop 2013 @Grenoble * outline CAS@home project Applications: Lammps: dynamical molecular simulation treeThreader: protein structure prediction Remote Job Submission * BOINC workshop 2013 @Grenoble * CAS@HOME * BOINC workshop 2013 @Grenoble * First and Only Volunteer Project in mainland China Launched in June 2010, hosted by the computer center of IHEP, CAS To support scientific computing from Chinese Academy of Sciences and other Research Institutes Host multiple applications from various research fields, including nanotechnology, bioinformation, physics CAS@home status * BOINC workshop 2013 @Grenoble * Ever Since it was launched in June 2010 10K active users 1/3 are Chinese 23K active hosts 7M CPU hours Since Nov 2012 Hosting 3 applications: Lammps , treeThreader, Aevol Other ongoing applications: BOSS (VBoxwrapper based) 1.3 TFLOPS (real time computing power) Peak: 1M/month validated CPU hours Some project Statistics Application 1: Lammps Software for dynamical molecular simulation, widely used by scientists from various research fields. Restartable, developed in C by an international group, can be compiled on both Windows and Linux with some effort. Input/output: 3 mandatory input files (10MB)/ 1 compressed output file (hundreds of MB) Running time : 0.5 hour to 800 hours (it depends on a random number which decides the steps of the simulation) * BOINC workshop 2013 @Grenoble * Problems Results are numerical, it generates discrepancy for 2 reasons: float point calculation on different platforms the checkpoints also cause discrepancy due to losing precision with printing the value to a text file. Solutions Homogeneous Redundancy, or Homogeneous Application Version Running problems: Some long jobs (~hundreds hours) crash in the middle without getting any credit. * BOINC workshop 2013 @Grenoble * Applica