On Thu, 2006-05-04 at 14:41, Greg Johnson wrote: > On Thu, May 04, 2006 at 01:48:29PM -0400, Hal Rosenstock wrote: > > On Thu, 2006-05-04 at 13:26, Greg Johnson wrote: > > > On Thu, May 04, 2006 at 01:08:54PM -0400, Hal Rosenstock wrote: > > > > On Thu, 2006-05-04 at 12:55, Greg Johnson wrote: > > > > > I actually want routes. > > > > > > > > OpenSM calculates the unicast and multicast routes and populates the > > > > (unicast and multicast) forwarding tables. > > > > > > > > > I have queried them with ibtraceroute and ibroute, > > > > > > > > ibroute dumps the forwarding tables and ibtracert traces the path from a > > > > source to a destination so these are displaying how OpenSM has setup the > > > > fabric which is a function of the routing algorithm chosen and the > > > > physical topology (which may be dynamic). > > > > > > > > > but we need routes for the whole fabric. > > > > > > > > Unicast, multicast, or both ? Just to look at ? There is no way to load > > > > these into OpenSM. > > > > > > At this point we are only interested in unicast routes. We would like > > > to be able to dump and load the forwarding tables. > > > > You can dump them (via ibroute) just not load them. > > Right. I imagine a tool that would dump the routes to a file that could > be reloaded later. If I could edit the file, I could load my own > routes as well. > > > > We have a single 288 port switch chassis for our cluster. We would like > > > to be able to > > > load routes for two reasons. One is to be able to do testing with a > > > fixed set of routes. > > > > So the topology is fixed and no links ever fail ? > > Yes, basically. We want this for testing, not production (at this > point). We can handle faults manually for now. The internal topology > of the switch chassis is fixed. > > > > The other is that we would like to program our own > > > routes into the switches. > > > > Once the fabric is up, what are the requirements ? Do you need SA > > queries (e.g. PathRecords) to work ? > > I'm not sure if we need SA queries. What are they good for?
Helping to set up connections, etc. > Basically, we want to be able to run MPI over the IB fabric. We don't need > anything else. I'm not sure if MVAPICH or OpenMPI use SA queries > internally. I don't think they do currently but will in the near term future. I'm not sure whether MVAPICH supports multicast but that also would require SA support. -- Hal > Greg _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
