Since the SA views multicast operations at a node level, and applications need to individually operate on multicast groups. It is appropriate for the core stack to provide some multicast management APIs. These would multiplex requests from all the applications on a node to make the appropriate requests to the SA. reference counts would need to be maintained in the core stack for each MC group so that the node would remove itself from the group only on last application exit/unregister.
This would also be a good place to handle the "MC group persistence issues". Namely rejoining requested groups when ports go up/down, SMs change (client reregister), etc. Todd Rimmer Chief Systems Architect SilverStorm Technologies Voice: 610-233-4852 Fax: 610-233-4777 [EMAIL PROTECTED] www.SilverStorm.com > -----Original Message----- > From: amith rajith mamidala [mailto:[EMAIL PROTECTED] > Sent: Thursday, December 22, 2005 4:39 PM > To: Sean Hefty > Cc: openib > Subject: RE: [openib-general] RFC MPI and app. requirements of OpenIB > > > > > An alternative is to provide UD and multicast/broadcast > support in the CMA. I > > know that the Intel MPI runs over DAPL, which does not > provide multicast > > support. Can MPI operate with unreliable multicast > support? Does MPI plan on > > using IB multicast? > > Yes, the MPI can operate with unreliable multicast support. > MVAPICH-0.9.6 has this broadcast support over IB multicast. As Hal > suggested earlier, application processes interact with SA to > create/join > multicast groups. > > Thanks, > Amith > > > > > > _______________________________________________ > > openib-general mailing list > > [email protected] > > http://openib.org/mailman/listinfo/openib-general > > > > To unsubscribe, please visit > http://openib.org/mailman/listinfo/openib-general > > > > _______________________________________________ > openib-general mailing list > [email protected] > http://openib.org/mailman/listinfo/openib-general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
