This is an archive of the ONOS 1.1 wiki. For the current ONOS wiki, look here.

This section discusses the design and implementation of the distributed aspects of ONOS. 

Overview

ONOS is built from the ground-up as a distributed SDN operating system. Consequently, ONOS may be deployed as a collection of servers that coordinate with each other to provide capabilities that is greater than the sum of its parts. For example, distribution provides fault-tolerance and resilience even when individual controller instances fail. Additionally, the system as whole can take on workloads that are far greater than what a single instance might be able to handle (scalability).

While distribution has its benefits, it also presents some interesting engineering problems. The following subsections delve into how ONOS identifies, and approaches, a select set of these aspects.

Remaining Sections

The next section presents an overview of cluster management, and how ONOS instances elect designated masters for each device a cluster discovers. The following section describes how network state is distributed across instances.

 


Previous : The Device Subsystem
 Next: Cluster Coordination


 



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