and OpenDaylight

dedication and continuous support

The year was 2001, when, the software research and development company was established in Bratislava, Slovakia. It had a focus on computer network technologies with love and care for open-source software development.

12 years into the life of on 22 of March 2013 to be exact, OpenDaylight (ODL) project has seen the first day light with the initial code drop. It had an ambition to be the biggest and most successful open-source Software Defined Networking (SDN) controller in the world.

ODL is a collaborative open source project aimed to speed up the adoption of SDN and create a solid foundation for Network Functions Virtualization (NFV). ODL was founded by the global industry leaders such as Cisco, Ericsson, Intel, IBM, Dell, HP, Red Hat, Microsoft and and open to all.’s nurture for ODL goes back when it was forming. In a sense, had led the way to define how an SDN controller is and should be. This required dedication, which was proven over the years with the extensive amount of contribution thanks to its expert developers.

Below these pie charts illustrate, how in ODL’s lifespan had always been within the top 5 contributors. Considering the committers view on the left chart ,the top committer proved his dedication with having almost 20% of the total commits single handedly, Robert Varga.

Total Commits, Committers View (Last five years)


 Total Commits, Company View (Last five years)

The core ODL projects are named: odlparent, yangtools,mdsal, controller, aaa, and netconf

Below the chart on the left indicate the current ODL projects which contributed to, and on the chart on the right side lists the contributors only the employees excluding the affiliated committers. had made 6973 commits with sharp developers in 51 ODL projects over the course of ODL’s lifespan. That is 563,479 added and 433,030 removed lines of code.

That translates roughly around 10 great novels written in.



Total PT Commits, Projects View (All time)


Total ODL Commits, Committers view (All time)

ODL continues to be a great example of what an open-source software is and how international contributors can collaborate beautifully to create the next great thing.

The OpenDaylight community is constantly evolving, which shows in the shift of organizations contributing to the project. Over the course of the last year,’s contributions have accounted for 16.74 percent of the total changesets covering the development of Oxygen and Fluorine releases. That makes the second largest contributor of ODL following the Red Hat organization.


Total Commits, Committers View (Last year)


Total Commits, Company View (Last year)

Now, let’s touch on the ODL’s internal governance , TSCs and PTLs etc.

ODL is now a founding member of LF Networking (LFN), an entity that integrates the governance of participating projects in order to enhance operational excellence, simplify member engagement, and increase collaboration across open source networking projects and standards bodies.

OpenDaylight Technical Steering Committee (TSC) provides leadership regarding the technical direction of the ODL platform, as well as guidance on collaborative practices. Developers are elected by the ODL community to serve one-year terms. Currently there are only 13 TSC members on duty and proudly a’s CTO – Robert Varga is one of them.

Project Technical Lead (PTL) is the leader of the ODL projects who get to decide if any of proposed changes becomes the part of the project or not. They are elected by the committers thanks to their expertise on the field.

Anyone can contribute to ODL which is an open-source project, but PTLs  are the ones who lead the project to the prospected direction. If you want to Learn how to get started with OpenDaylight, you can read more as a developer or as a user.

ODL had started with just five projects and thrived. Currently, there are 91 active projects and proudly involved, contributed to a very big proportion of it. Just another example of its expertise on the subject.

Apart from’s top contribution to ODL, has always been a strong supporter of the open source community. This support covers wide range of developers from local private open source development groups to international open source platforms. Such examples continuously supports are: Local Open Source Networking User Groups, (OSNUG) OpenDaylight User Groups, OSS weekend meetings to name a few. But, the most generous of was to open-source one of its best developments called That is just another tale to be told in another post.