A Scalable, Commodity Data Center Network Architecture
by Mohammad Al-Fares, Alexander Loukissas, Amin Vahdat
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| url: | http://ccr.sigcomm.org/online/files/p63-alfares.pdf | | abstract: | Today’s data centers may contain tens of thousands of computers
with significant aggregate bandwidth requirements. The network
architecture typically consists of a tree of routing and switching
elements with progressively more specialized and expensive equipment
moving up the network hierarchy. Unfortunately, even when
deploying the highest-end IP switches/routers, resulting topologies
may only support 50% of the aggregate bandwidth available at the
edge of the network, while still incurring tremendous cost. Nonuniform
bandwidth among data center nodes complicates application
design and limits overall system performance.
In this paper, we show how to leverage largely commodity Ethernet
switches to support the full aggregate bandwidth of clusters
consisting of tens of thousands of elements. Similar to how clusters
of commodity computers have largely replaced more specialized
SMPs and MPPs, we argue that appropriately architected and interconnected
commodity switches may deliver more performance at
less cost than available from today’s higher-end solutions. Our approach
requires no modifications to the end host network interface,
operating system, or applications; critically, it is fully backward
compatible with Ethernet, IP, and TCP. |
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