A High-Performance Design, Implementation, Deployment, and Evaluation of The Slim Fly Network

Novel low-diameter network topologies such as Slim Fly (SF) offer significant cost and power advantages over the established Fat Tree, Clos, or Dragonfly. To spearhead the adoption of low-diameter networks, we design, implement, deploy, and evaluate the first real-world SF installation. We focus on deployment, management, and operational aspects of our test cluster with 200 servers and carefully analyze performance. We demonstrate techniques for simple cabling and cabling validation as well as a novel high-performance routing architecture for InfiniBand-based low-diameter topologies. Our real-world benchmarks show SF's strong performance for many modern workloads such as deep neural network training, graph analytics, or linear algebra kernels. SF outperforms non-blocking Fat Trees in scalability while offering comparable or better performance and lower cost for large network sizes. Our work can facilitate deploying SF while the associated (open-source) routing architecture is fully portable and applicable to accelerate any low-diameter interconnect

OPTIMEX: Měření detonační rychlosti pasivním vláknovým systémem

Detonation velocity (VOD) is one of the most important parameters describing the detonation process of a particular explosive. This article summarizes some peculiarities that we have come across when building and testing our new passive optical VOD meter - OPTIMEX. The advantages of using multiple probes with independent signal recording is discussed. The practical issues related to an explosive's translucency are solved. Finally, a new method for detonation velocity data evaluation is proposed and demonstrated.Detonační rychlost je jedním z nejdůležitějších parametrů popisujících proces detonace konkrétní výbušiny. Tento článek shrnuje nekteré poznatky, ke kterým jsme došli v průběhu vývoje našeho nového pasivního přístroje, nazvaného OPTIMEX, pro měření detonační rychlosti. Jsou rozebrány výhody využití více oddělených měřících kanálů. Je popsáno vyřešení problému s transparentností výbušin. V závěru je navržena nová metoda vyhodnocení naměřených dat