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Wednesday, February 5 • 11:20am - 12:10pm
Consistency Trade-offs for SDN Controllers, Colin Dixon, IBM

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The CAP theorem states that any distributed system, e.g., an OpenDaylight controller cluster, can have at most two of consistency, availability and partition-tolerance. As preventing partitions is hard, most distributed systems trade off between consistency and availability. SDN is a particularly challenging area for CAP trade-offs as partitions are likely to have clients, e.g., switches, on both sides. Thus, to keep the controller cluster available for all switches, it must seemingly give up consistency. Despite this, I believe we can do better than just dealing with eventual consistency. This talk will present these trade-offs and present several approaches that can provide minimal, and predictable, inconsistency while remaining available. This will include, exploiting data locality and a model for forking consistency.

avatar for Colin Dixon

Colin Dixon

TSC Chair, Distinguished Engineer, OpenDaylight, Brocade
Colin Dixon is the Chair of OpenDaylight's Technical Steering Committee and a Distinguished Engineer at Brocade. In both roles, he focuses on leveraging open source software to build innovative networking solutions. Beyond that, he is active in open standards bodies including the Open Networking Foundation, where he has won two outstanding technical contributor awards for his contributions to Table Type Patterns that support using OpenFlow with... Read More →

Wednesday February 5, 2014 11:20am - 12:10pm
Grand Ballroom B

Attendees (13)