Warning
Iceberg reaches end-of-life on 30th November 2020. If you are running jobs on Iceberg then you need to take urgent action to ensure that your jobs/scripts will run on ShARC or Bessemer. If you have never used ShARC or Bessemer then now is the time to test your scripts. Not all software on Iceberg is available on ShARC/Bessemer.
The Cooperative Computing Tools (cctools) contains Parrot, Chirp, Makeflow, Work Queue, SAND, and other software.
After connecting to Iceberg (see Establishing a SSH connection), start an interactive session with the qrsh or qrshx command.
The default version of cctools is made available with the command
module load apps/binapps/cctools
Alternatively, you can explicitly load a specific version using:
module load apps/binapps/cctools/6.2.10
parrot_run provided by cctools can be used to provide access to CernVM-FS
e.g. to access the Atlas CernVM-FS repo
parrot_run bash
ls /cvmfs/atlas.cern.ch/repo
LibCvmfs version 2.4, revision 25
ATLASLocalRootBase benchmarks conditions containers dev images sw tools
The environment variable PARROT_CVMFS_ALIEN_CACHE is used to specify the location for the CVMFS cache.
By default the cctools module will set PARROT_CVMFS_ALIEN_CACHE to your /data directory. You can override this behavior by setting PARROT_CVMFS_ALIEN_CACHE to another location.
The environment variable PARROT_CVMFS_REPO can be used to add other repositories.
For more info on using the parrot connector see CernVM-FS documentation
These are primarily for administrators of the system.
cctools 6.2.10
Download the cctools tarball (cctools-6.2.10-x86_64-redhat6.tar.gz) from CCL.
Save this file to /usr/local/media/cctools/6.2.10/
Install cctools using this script
Install this modulefile as /usr/local/modulefiles/apps/binapps/cctools/6.2.10