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<html><head><title>Re[2]: [Beowulf] Has DDR IB gone the way of the Dodo?</title>
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<p>Hallo Prentice,</p>
<p><br></p>
<p>Mittwoch, 1. Oktober 2008, meintest Du:</p>
<p><br></p>
<p><span class=rvts6>PB> And what is the status of DDR? Are people still using it, or has it</span></p>
<p><span class=rvts6>PB> already been replaced by QDR in the marketplace?</span></p>
<p><br></p>
<p>DDR is still the most important Infiniband in the market. DDR provides enough bandwidth for most applications at the moment because most applications suffer from latency - not limited bandwidth. QDR is more interesting for building spine networks. And QDR might get more important if we see more cores in typical compute nodes. </p>
<p><br></p>
<p><span class=rvts7>>> Cisco does appear to be transitioning to *other* technologies. Again,</span></p>
<p><span class=rvts7>>> they aren't the only IB provider out there (seems such a shame, gobbling</span></p>
<p><span class=rvts7>>> up TopSpin and then effectively discarding them).</span></p>
<p><br></p>
<p><span class=rvts6>PB> What *other* technolgies are you talking about QDR IB, or something</span></p>
<p><span class=rvts6>PB> other than IB altogether, like 10 Gb Ethernet, or something all new and</span></p>
<p><span class=rvts6>PB> proprietary?</span></p>
<p><br></p>
<p>Cisco is dropping IB - probably to go for 10GE. It was a short time for Cisco offering IB solutions - bur probably they weren't very successful.</p>
<p><br></p>
<p>Jan</p>
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