next up previous contents index
Next: MPI case: How much Up: Running Parallel Jobs Previous: Setting up the parallel   Contents   Index

Starting parallel jobs

After setting up the parallel environment as described in the previous section, parallel jobs can be started just like the serial ones. If the input is a serial one, it will be prepared automatically for the parallel run.

The parallel versions of the programs dscf and grad can use an integral statistics file as input which is generated by a parallel statistics run. This preparation step is done automatically by the scripts dscf and grad that are called in the parallel version.

This serial step to determine a task distribution for the later parallel run can be lengthy for larger cases, and it is recommended to skip this step and let the programs determine the optimal task distribution dynamically during the parallel execution. This can be done by setting the environment variable

export SKIP_PARA_STAT=yes

For the additional mandatory or optional input for parallel runs with the ricc2 program see Section 9.6.