> Are you saying all messages are between adjacent neighbors on the ring ? Yes. Say I have 6 nodes: A, B, C, D, E, F, then the ring topo will be A<->B, B<->C, C<->D, D<->E, E<->F, F<->A, and there are totally 6 subnets.
> If it is just A->B, B->C, ..., and never across the ring, then this can > work but you need an SM instance per subnet. Do I need a router per subnet as well? > If you need some router mode, then this is still a work in progress for > InfiniBand although you might be able to get to a proprietary solution > in the short term. What version of OFED will have router mode available? Thanks! Yicheng Hal Rosenstock <[EMAIL PROTECTED]> 02/01/2008 04:45 PM To Yicheng Jia <[EMAIL PROTECTED]> cc [email protected], Roland Dreier <[EMAIL PROTECTED]> Subject Re: [ofa-general] SA code? Hi Yicheng, On Fri, 2008-02-01 at 16:38 -0600, Yicheng Jia wrote: > > Hi Hal, > > The only reason is cost down. Understood. > The cost of IB switch weighs too much in our product, it seems the > ring topology is the only way to go. There's no message across the > ring, all the communication occurs within the ring. Are you saying all messages are between adjacent neighbors on the ring ? > Would it cause the performance substantially go down? If it is just A->B, B->C, ..., and never across the ring, then this can work but you need an SM instance per subnet. If you need some router mode, then this is still a work in progress for InfiniBand although you might be able to get to a proprietary solution in the short term. -- Hal > Thanks! > Yicheng > > > > Hal Rosenstock > <[EMAIL PROTECTED]> > > 02/01/2008 04:25 PM > > > To > Yicheng Jia > <[EMAIL PROTECTED]> > cc > Roland Dreier > <[EMAIL PROTECTED]>, [email protected] > Subject > Re: [ofa-general] > SA code? > > > > > > > > > On Fri, 2008-02-01 at 16:14 -0600, Yicheng Jia wrote: > > > > Hi Roland, > > > > Is there SA code available in OFED? I have a IB switch to connect > all > > the mellanox HCAs, the SA is running on the switch's firmware. My > goal > > is to skip the switch and use ring topology to connect the HCA with > > each other. Is it doable in OFED? > > I don't understand what you're trying to accomplish with this > topology. > In IB speak, each HCA <-> HCA link would be a separate subnet. Do you > intend to forward across your ring ? If so, only some "router" mode > would allow that with the topology you propose. > > -- Hal > > > Thanks! > > Yicheng > > _______________________________________________ > > general mailing list > > [email protected] > > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > > > To unsubscribe, please visit > http://openib.org/mailman/listinfo/openib-general > > > _____________________________________________________________________________ > Scanned by IBM Email Security Management Services powered by > MessageLabs. For more information please visit http://www.ers.ibm.com > _____________________________________________________________________________ > _____________________________________________________________________________ Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com _____________________________________________________________________________
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