Environnement Commun Linux

• Environment control via .profile
• Running job monitor
• Queued work streams
• Utility libraries
  • hpcsperf
  • rmnlib
  • rpn_comm
  • JIO (io monitoring)
• Useful environment variables
  • PATH : colon ':' separated list of directories where executables or sourced (.) shell includes are to be found
    
  • LD_LIBRARY_PATH : colon ':' separated list of directories where dynamic libraries (.so files) needed by executables can be found
    
  • EC_LD_LIBRARY_PATH : colon ':' separated list of directories where s.compile, s.f90  et al. will look for libraries
    
  • EC_INCLUDE_PATH : colon ':' separated list of directories where s.compile, s.f90  et al. will look for include files
    
  • BASE_ARCH : name of the hardware architecture of the machine
  • EC_ARCH : name of the hardware+software architecture of the machine (BASE_ARCH + compiler usually)
• Useful memory layout information
  • Linux memory layout
    
• Useful information about system
  • /proc/cpuinfo : pseudo file containing a full description of logical cpus in a linux system (cat/less/more)
• Some useful commands
  • r.mpirun2 : script front end to mpiexec hiding machine/mpi implementation specific details
  • ord_soumet : script used to submit jobs, hiding machine/batch subsystem specific details