On Fri, 11 Nov 2011, Kai Germaschewski wrote: > One was NASA's CCMC (community coordinated modeling center) running > mvapich, the other, IIRC, was a local cluster with mpich-gm (Myrinet).
I guess sysadmins on some of the older machines that are chugging along are reluctant to upgrade. [If its wokred fine so far why bother changing? And change usually means tons of user e-mail - extra effor on a machine that can potentially be replaced soon..] However I believe - in these cases - the user can install a newer MPI with same functionality [mvapich or mpich2-gm] - and be able to use such clusters. Should we rely on this approach? Its not clear to me if there are older non-cluster machines still in use - with vendor MPI thats not easy for the user to circumvent with his/her own newer MPI install.. Satish
