We want to move from Intel MPI 2018update3 to 2019update3, but ran into a number of problems, e.g. with fabric selection, hydra options and environment variables not working (or not supported any longer?). This makes job in our cluster fail, or hang. In the announcement for the beta program for the 2019 release, one could read that there are e.g. changes in the hydra mechanism, but are those changes documented somewhere? Like new options, deprecated options, etc ...
One example: we use LSF as our scheduler, and we set therefore certain I_MPI_HYDRA_* options to reflect this. However, a multi-node MPI job still uses 'ssh' as a launcher, where we expect it use 'blaunch'. This worked nicely in 2018 and earlier versions, but not in 2019.
Anybody else encountering problems like this? Or do I need to open a support case?
Thanks!
Bernd