Journal
ACM SIGCOMM COMPUTER COMMUNICATION REVIEW
Volume 38, Issue 4, Pages 63-74Publisher
ASSOC COMPUTING MACHINERY
DOI: 10.1145/1402946.1402967
Keywords
design; performance; management; reliability; data center topology; equal-cost routing
Categories
Funding
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [821155] Funding Source: National Science Foundation
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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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