NDLI: Efficient topologies for large-scale cluster networks

Content Provider	IEEE Xplore Digital Library
Author	Kim, J. Dally, W.J. Abts, D.
Copyright Year	2010
Description	Author affiliation: Stanford Univ., Stanford, CA, USA (Dally, W.J.) \|\| KAIST, Daejeon, South Korea (Kim, J.) \|\| Google Inc., Madison, WI, USA (Abts, D.)
Abstract	Increasing integrated-circuit pin bandwidth has motivated a corresponding increase in the degree or radix of interconnection networks and their routers. This paper describes the flattened butterfly, a cost-efficient topology for high-radix networks. On benign (load-balanced) traffic, the flattened butterfly approaches the cost/performance of a butterfly network and has roughly half the cost of a comparable performance Clos network. The advantage over the Clos is achieved by eliminating redundant hops when they are not needed for load balance. On adversarial traffic, the flattened butterfly matches the cost/performance of a folded-Clos network and provides an order of magnitude better performance than a conventional butterfly. In this case, global adaptive routing is used to switch the flattened butterfly from minimal to non-minimal routing - using redundant hops only when they are needed. Different routing algorithms are evaluated on the flattened butterfly and compared against alternative topologies. We also provide a detailed cost model for an interconnection network and compare the cost of the flattened butterfly to alternative topologies to show the cost advantages of the flattened butterfly.
Starting Page	1
Ending Page	3
File Size	271054
Page Count	3
File Format	PDF
ISBN	9781557528841
DOI	10.1364/OFC.2010.OMV1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-03-21
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	OSA
Subject Keyword	Network topology Large-scale systems Costs Routing Bandwidth Multiprocessor interconnection networks Telecommunication traffic Diversity reception Switches Cooling
Content Type	Text
Resource Type	Article

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