[openib-general] [RFC][PATCH] rdma_cm: allow joins to return a unique address

[Or Gerlitz]

On 1/30/07, Sean Hefty <mshefty at ichips.intel.com> wrote:
> I believe that this patch lets you can do what you're trying to do.  The group
> handle would be the returned mgid from the initial join that created the group.
>   The mgid would need to be passed to other processes as an IPv6 address, who
> issue a join request on that group.  (The mgid is available from the
> rdma_cm_event.param.ud.ah_attr.grh.dgid.)

Sean,

I understand that your approach relies on the uniqueness of the MGID
being generated. This means that to have different MPI jobs use
different MGIDs , the MGIDs must be generated --always-- on the same
NODE and be propagated to other nodes/ranks participating in that MPI
job - correct?

Andrew - can you fulfil this demand? that is having the rank which
generated MGIDs always run on the same node of the cluster???

Or.