Nvidia turns to optical trickery to boost long-haul InfiniBand performance
Assuming you do live within Nvidia's walled garden, or want to expand an existing InfiniBand environment to a new location, there are also performance concessions that need to be taken into account. While DWDM allows for massive aggregate bandwidths over a single fiber, the technology is limited to relatively short runs in the neighborhood of 40 to 80 kilometers. As is typical with optics, what you gain in distance you give up on effective bandwidth and vice versa.
The move to DWDM does present a cost advantage. According to Dell'Oro analyst Jimmy Yu, the more you be can pack onto a single fiber strand, the less you need to spend on fiber leases to achieve a given amount of bandwidth. And because DWDM is already widely employed by major telcos AT&T and Lumen Technology, Nvidia says customers can now tap into existing fiber infrastructures, rather than needing dedicated fiber connectivity.MetroX-3 is part of a broader suite of hardware and software announced by Nvidia at the Supercomputing event this week aimed at addressing the growing volume of streaming data at the edge.
"By creating more high-fidelity research and instrumentation, that means that you're going to have to have a much more efficient way of capturing, analyzing and processing that data," Harris said. When"you're producing 50 to 1,000 times more data, how much do you keep? How much do you move back to the core? How much do you analyze."
In addition to connecting datacenters over InfiniBand, Nvidia is positioning MetroX-3, along with its Quantum-series switches and BlueField DPUs, as a means to extend InfiniBand networks to lab environments where the bulk of data is being generated. By doing so, the company says customers can use its Holoscan HPC framework running on IGX, DGX or HGX platforms at the edge to sift out meaningful data from the noise before funneling that refined dataset back to the core datacenter.
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