<br><tt><font size=2>> Are you saying all messages are between adjacent
neighbors on the ring ?</font></tt>
<br><tt><font size=2>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.</font></tt>
<br>
<br><tt><font size=2>> If it is just A->B, B->C, ..., and never
across the ring, then this can<br>
> work but you need an SM instance per subnet.<br>
Do I need a router per subnet as well?</font></tt>
<br><tt><font size=2><br>
> If you need some router mode, then this is still a work in progress
for<br>
> InfiniBand although you might be able to get to a proprietary solution<br>
> in the short term.</font></tt>
<br><tt><font size=2>What version of OFED will have router mode available?</font></tt>
<br>
<br><tt><font size=2>Thanks!</font></tt>
<br><tt><font size=2>Yicheng<br>
</font></tt>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>Hal Rosenstock <hrosenstock@xsigo.com></b>
</font>
<p><font size=1 face="sans-serif">02/01/2008 04:45 PM</font>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">Yicheng Jia <YJia@tmriusa.com></font>
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<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">general@lists.openfabrics.org, Roland
Dreier <rdreier@cisco.com></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [ofa-general] SA code?</font></table>
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<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><tt><font size=2>Hi Yicheng,<br>
<br>
On Fri, 2008-02-01 at 16:38 -0600, Yicheng Jia wrote:<br>
> <br>
> Hi Hal, <br>
> <br>
> The only reason is cost down.<br>
<br>
Understood.<br>
<br>
> The cost of IB switch weighs too much in our product, it seems
the<br>
> ring topology is the only way to go. There's no message across the<br>
> ring, all the communication occurs within the ring. <br>
<br>
Are you saying all messages are between adjacent neighbors on the ring
?<br>
<br>
> Would it cause the performance substantially go down? <br>
<br>
If it is just A->B, B->C, ..., and never across the ring, then this
can<br>
work but you need an SM instance per subnet.<br>
<br>
If you need some router mode, then this is still a work in progress for<br>
InfiniBand although you might be able to get to a proprietary solution<br>
in the short term.<br>
<br>
-- Hal<br>
<br>
> Thanks!<br>
> Yicheng <br>
> <br>
> <br>
> <br>
> Hal Rosenstock<br>
> <hrosenstock@xsigo.com> <br>
> <br>
> 02/01/2008 04:25 PM <br>
> <br>
> <br>
> To<br>
> Yicheng Jia<br>
> <YJia@tmriusa.com> <br>
> cc<br>
> Roland Dreier<br>
> <rdreier@cisco.com>, general@lists.openfabrics.org <br>
> Subject<br>
> Re: [ofa-general]<br>
> SA code?<br>
> <br>
> <br>
> <br>
> <br>
> <br>
> <br>
> <br>
> <br>
> On Fri, 2008-02-01 at 16:14 -0600, Yicheng Jia wrote:<br>
> > <br>
> > Hi Roland, <br>
> > <br>
> > Is there SA code available in OFED? I have a IB switch to connect<br>
> all<br>
> > the mellanox HCAs, the SA is running on the switch's firmware.
My<br>
> goal<br>
> > is to skip the switch and use ring topology to connect the HCA
with<br>
> > each other. Is it doable in OFED? <br>
> <br>
> I don't understand what you're trying to accomplish with this<br>
> topology.<br>
> In IB speak, each HCA <-> HCA link would be a separate subnet.
Do you<br>
> intend to forward across your ring ? If so, only some "router"
mode<br>
> would allow that with the topology you propose.<br>
> <br>
> -- Hal<br>
> <br>
> > Thanks!<br>
> > Yicheng<br>
> > _______________________________________________<br>
> > general mailing list<br>
> > general@lists.openfabrics.org<br>
> > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general<br>
> > <br>
> > To unsubscribe, please visit<br>
> http://openib.org/mailman/listinfo/openib-general<br>
> <br>
> <br>
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