Scaling a Collaboration Service like Nextcloud to 20 Million users

We are heading into a world where the files of most users are hosted by 4 big companies in the US. This is the case for most home users, companies but also education and research institutions. If we want to keep our sovereignty over our data, protect our privacy and prevent vendor lock-in then we need open source self-hosted and federated alternatives. The internet and the web use a distributed and federated architecture. Now we have to make sure that cloud services follow the same model. This talk will cover how this can be implemented in a real world example. It covers how a 20 million user instance of Nextcloud can be scaled across different hosting centers and continents. It will cover high level concepts but also concrete Kubernetes, Ceph and MariaDB clustering setups.


  • Frank Karlitschek
    Frank Karlitschek

    Frank Karlitschek is a long-time open source contributor and former board member of the KDE e.V. He founded ownCloud in 2010 and the successor Nextcloud in 2016 to create a fully open source and decentralized alternative to big centralized cloud companies. Frank was an invited expert at the W3C to help to create the ActivityPub standard. Frank has spoken at MIT, CERN, Harvard and ETH and keynoted LinuxCon, Latinoware, FOSSASIA, Campus Party and many other conferences. Frank is the founder and CEO of Nextcloud GmbH. He is also a fellow of Open Forum Europe and an advisor to the United Nations.


Sep 13 - 14 2023