[ofa-general] opensm, OFED 1.3/1.4

[Michael Oevermann]

Hi all,

I am trying to set up a cluster (with OSCAR) with infiniband using 
CentOS/RHEL 5.2. Only the compute nodes have
IB NICS, the head node doesn't. At this point I want to use the packages 
of the CentOS repositories which
are - as far as I know - based on OFED 1.3 to avoid package conflicts 
and dependency problems I run
into if I compile OFED 1.4 from source. I have two questions:

1) can I still use the OFED 1.4 source to compile the most recent MPI 
versions (e.g. MVAPICH2, which is not in the
CentOS repository). Or is it just a bad idea to mix versions here?

2) As far as I understand, I need the opensm subnet manager. Can I run 
this manager on the head node (which has
no IB NIC) or do I need to run it on one of the nodes. I would prefer to 
run it on the head node in order to
keep all nodes exactly identical.

Best regards and thanks for info

Michael