Many thanks for all answers ! It looks for me now that OpenHPC choice may will be best for me. 1 of my 2 existing clusters is based on RH, 2nd - on OpenSuSE. Basing of OpenHPC on repositories is plus for me. Plus support of mvapich2/OpenMPI/intelMPI (I don't know about basical MPICH). Etc. Are there, by your opinions, some clear OpenHPC minuses ?
Mikhail
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