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But the network that lashes the compute together is literally the beat of the drums and the thump of the bass that keeps everything in synch and allows for the harmonies of the singers to come together at all.

In this analogy, it is not clear what HPC storage is. It might be the van that moves the instruments from town to town, plus the roadies who live in the van that set up Intel H2000WPQ Mellanox InfiniBand stage and lug that gear around.

In any event, Intel H2000WPQ Mellanox InfiniBand always try to get as much insight into the networking as we get into the compute, given how important both are to the performance of any kind of distributed system, whether it is a classical HPC cluster running simulation and modeling applications or a distributed hyperscale database. Despite being a relative niche player against the vast installed base of Ethernet gear out there in the datacenters of the world, InfiniBand continues to hold onto the workloads where the highest bandwidth and the lowest latency are required.

Sterowniki Karty sieciowe Mellanox - Driversorg - Znajdź sterowniki dla swoich urządzeń.

We are well aware that the underlying technologies are different, but Intel Omni-Path runs the same Open Fabrics Enterprise Distribution drivers as the Mellanox InfiniBand, so this is a hair that Intel is splitting that needs some conditioner. Like the lead singer in a rock band from the s, we suppose. Omni-Path is, for most intents and Intel H2000WPQ Mellanox InfiniBand, a flavor of InfiniBand, and they occupy the same space in the market. Mellanox has an offload model, which tries to offload as much of the network processing from the CPUs in the cluster to the host adapters and the switch as is possible.

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Intel will argue that this allows for its variant of InfiniBand to scale Intel H2000WPQ Mellanox InfiniBand because the entire state of the network can be held in the memory and processed by each node rather than a portion of it being spread across adapters and switches. We have never seen a set of benchmarks that settled this issue. And it is not going to happen today.


As part of its SC17 announcements, Mellanox put together its own comparisons. In the first test, the application is the Fluent computational fluid Intel H2000WPQ Mellanox InfiniBand package from ANSYS, and it is using a wave loading stress on an oil rig floating in the ocean. Mellanox was not happy with these numbers, and ran its own EDR InfiniBand tests on machines with fewer cores 16 cores per processor with the same scaling of nodes from 2 nodes to 64 nodes and these are shown in the light blue columns.

The difference seems to be negligible on relatively small clusters, however. This particular test is a 3 vehicle collision simulation, specifically showing what happens when a van crashes into the rear of a compact car, and that in turn crashes into a mid-sized car.

This is what happens when the roadie is tired. Take a Intel H2000WPQ Mellanox InfiniBand It is not clear what happens to the Omni-Path cluster as it scales from 16 to 32 nodes, but there was a big drop in performance. It would be good to see what Intel would do here on the same tests, with a lot of tuning and tweaks to goose the performance on LS-DYNA.

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The EDR InfiniBand seems to have an advantage again only as the application scales out across a larger number of nodes. This runs counter to the whole sales pitch of Omni-Path, and we encourage Intel to respond. With the Vienna Ab-inito Simulation Package, or VASP, quantum mechanical molecular dynamics application, Mellanox shows its InfiniBand holding the Intel H2000WPQ Mellanox InfiniBand advantage against Omni-Path across clusters ranging in size from 4 to 16 machines: The application is written in Fortran and uses MPI to scale across nodes. The HPC-X 2.


Take a gander: In Intel H2000WPQ Mellanox InfiniBand test, Mellanox ran on clusters with from two to 16 nodes, and the processors were the Xeon SP Gold chips: What is immediately clear from these two charts is that the AVX math units on the Skylake processors have much higher throughput in terms of delivered double precision gigaflops, even if you compare the HPC-X tuned-up version of EDR InfiniBand, it is about 90 percent more performance per core on the node comparison, and for Omni-Path, it is more like a factor of 2. Which is peculiar, but probably has some explanation.

Intel H2000WPQ Mellanox InfiniBand Firmware

Mellanox wanted to push the scale up a little further, and on the Broadwell cluster with nodes which works out to 4, cores in total it was able to push the performance of EDR InfiniBand up to around 9, aggregate gigaflops running the GRID test. You can see the full tests at this link. To sum it all up, this is a summary chart that shows how Omni-Path stacks up against a normalized InfiniBand: Intel will no doubt counter with some tests of its own, and we welcome any additional insight. The point of this is not just to get a faster network, but to either spend less money on servers because the Intel H2000WPQ Mellanox InfiniBand runs more efficiently or to get more servers and scale out the application even more with the same money.

That is a worst case example, and the gap at four nodes is negligible, small at eight nodes, and modest at 16 nodes, if you look up to the data. Intel Compute Module HNSTPF, Onboard InfiniBand* Firmware Module HNSWPQ/HNSWPF, System HWPQ/HWPF Firmware.

Mellanox InfiniBand and Ethernet Solutions Accelerate New Intel® Xeon® Scalable Processor-Based Platforms for High Return on Investment. Mellanox InfiniBand solutions provide In-Network Computing acceleration engines to enhance the Intel® Xeon® Scalable processor usage and Missing: HWPQ.

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