hp openflow plugin and libraries

www.opendaylight.org

HP OpenFlow Plugin and LibrariesJune 30, 2014

www.opendaylight.org2

We are new to this community and have taken the opportunity to learn and explore where we can help and how we can contribute.

One way we hope to contribute is by sharing the learnings we’ve gathered from productizing our SDN controller.

Our efforts to support OpenFlow on the various HP switches and the performance challenges that we’ve overcome is one of the first steps that we are hoping to take to contribute back to the community.

Why We Are Here


Performance is important especially for productization

It is our experience that performance is affected both by how the SAL is structured how the controller handles I/O

Performance


We are able to achieve consistent and sustained performance of ~3Mpps.

Performance Numbers

4Xeon 2.93 GHz 24 core PC with 12 GB RAM


Xeon 2.93 GHz 24 core PC with 12 GB RAM


Demo


Abstraction Abstract access to the network model

IOLoop Efficient handling of connections and I/O

Testing & Quality Maintain high level of coverage and regression

How We Got There


Allows caching to provide fast access to commonly used views

Allows us to summarize and extract information from the data, without forcing app users to process the model directly

Allows us to change the underlying implementation and optimize how we acquire, process, distribute, and track the data

Abstraction


We started out with Netty, but discovered a critical limitation Fails to aggressively pack multiple messages into a

single frame Performance capped at ~1.2Mpps

We adapted an existing network I/O library allowing us to achieve throughput of ~3Mpps

The I/O library itself is capable of 10s of Mpps, the ~3Mpps is performance obtained end-to-end, including encoding/decoding of packets, network service processing, etc…

IOLoop


Unit test code coverage >80% Extensive Javadoc documentation

Testing & Quality


Deep Dive


System Abstraction

NETCONF

Node Host Link Topo Path Flow PacketBase

Drivers

Service & Model

Node

Suppliers & Brokers

Host Link Topo Path Flow Packet

Node Host Link Topo Path Flow PacketBase

Drivers

Drivers

SNMPOpenFlow . . .

API

API

Managers

Suppliers

Protocols

Facets


OpenFlow Subsystem Overview


Connection & I/O


Packet Ins

15


CBench Packet Flow


Demo


Q&A


Backup Slides


Create, Encode, & Decode Messages

hp openflow plugin and libraries

Documents

performance challenges

sustained performance

performance numbers4xeon

fast access

network service processing

data model

service apis

existing network io