A load balanced routing scheme for slimmed fattrees. Eth no optimized protocol stack for virtualized converged enhanced ethernet a thesis submitted to attain the degree of doctor of sciences of eth zurich dr. Dmodk has been independently proposed and investigated. Publishing platform for digital magazines, interactive publications and online catalogs. Interconnect racks of servers using a fat tree topology. Randomized loadbalanced routing for fattree networks arxiv. Its main characteristics are the low mean path length and the. A weighted fattree routing algorithm for efficient load. While existing static routing schemes such as destinationmodk dmodk routing are loadbalanced and effective for full bisection bandwidth fat trees, they incur significant load imbalance in many slimmed fat trees. Xgft fattrees are extended to enable parallel ports between switches, thereby defining pgft. Bridges run a spanning tree protocol to set up a tree topology first packet from a sender to a destination is broadcasted to all destinations in the ip subnet along the spanning tree bridges on the path learn the senders mac address and incoming port return packets from a destination to a sender are unicast along the learned. While existing static routing schemes such as destinationmodk dmodk routing are loadbalanced and effective for full bisection bandwidth fat. Optimized routing for fattree topologies simula research. Dmodk routing providing nonblocking traffic for shift.
Routing in fat tree can be partitioned into two stages. Smodk is the default routing algorithm given as an example in the first works formally. First, we use dmodk path selection scheme to allocate default paths to all. Convert documents to beautiful publications and share them worldwide. Slimmed fattrees have recently been proposed and deployed to reduce costs in high performance computing hpc clusters. Fattree routing and node ordering providing contention. Routing in fat trees is composed of a routing function and a selection function.
Aai distributed computing operating system technology. Index termsfattree networks, dynamic loadbalancing routing. First, two popular oblivious routing algorithms, which we refer to as smodk and dmodk, continue reading. Pdf randomized loadbalanced routing for fattree networks. Pdf in the context of extended generalized fat tree xgft topologies, widely used in hpc and datacenter network. A comparative analysis of routing protocols such as adhoc ondemand distance vector routing system aodv, dynamic source routing dsr and optimized link state routing olsr is been made against different network parameters like network load, end to end delay and throughput in small, medium and largescale sensor network scenarios to. Interconnection network architectures for highperformance. A family of oblivious routing schemes for fat trees and their slimmed versions is presented in this work. Epf born on citizen of romania accepted on the recommendation of prof. Highlights all known medium or large message mpi collectives use fixed displacement permutations.
Average application communication times s for dmodk and vlb routing for. Smodk is the default routing algorithm given as an example in the. A fast patternspecific routing for fat tree networks scalable. Inefficient routing approaches can induce significant levels of network conges. Proceedings of the 8th international workshop on interconnection network architecture onchip, multichip inaocmc 14, 2014.
Introduction networkig strategy was origially employed i the 950s by the telephoe idustry as a meas of reducig the time required for a. The kary ntree topology 16, based on the classical fattree topology introduced by leiserson 8, is often the topology of choice to build low latency, high bandwidth and high connectivity interconnection networks hereafter in for parallel computers. Optimized optimal fat tree routing for mpi collectives. Pdf fast patternspecific routing for fat tree networks. Unidirectional loadbalanced multistage interconnection network. An ideal fat tree is a kary tree interconnection network where the bandwidth of each. A scalable, commodity data center network architecture.
Oblivious routing schemes in extended generalized fat tree. Smodk is the default routing algorithm given as an example in the first works formally describing fat tree networks. First, two popular oblivious routing algorithms, which we refer to as smodk and dmodk, are analyzed in detail. Pdf fattrees routing and node ordering providing contention. The network architecture typically consists of a tree of routing and switching. Routing in fat tree networks can be source based or destination based, and can be closed form or iterative sourcebased outport for a packet at a switch based on source node identifier destinationbased outport for a packet at a switch based on destination node identifier closed form dmodk, smodk iterative. Optimized protocol stack for virtualized converged.
649 747 741 39 655 779 53 362 909 71 822 1289 134 1025 24 1134 1094 1162 1433 275 1376 422 383 1382 394 1203 367 344 1104 1018 1195 1196 210 863 327 529 4 807 880