ibrun - launch MPI jobs from an implementation-independent command
This application launches an MPI job using a simple user interface that automatically configures the implementation- and system-specific features on whichever MPI stack the user wants to use. It also provides an administrator-configurable optimal set of settings as well as a best-guess binding policy based on job geometry.
This application was inspired by the ibrun implementation created by the Texas Advanced Computing Center and strives to be, at minimum, functionally equivalent at the user level. The SDSC version also provides additional functionality and features which augment the core featureset.
Currently the following features are not supported:
- MPICH2 stack
- vSMP queue and nodes (SDSC Gordon)
- -o and -no options
The following edge cases are not necessarily handled gracefully:
- When -n is less than -N
- When -n is 1
- completely separate the option detection for user input, resource manager, and internal guessing
- provide stronger unification for the -tpp and -npernode option
This application is currently maintained by Glenn K. Lockwood at the San Diego Supercomputer Center.