eHealth Summit 2026
On November 4–5, 2026, leading voices across the digital healthcare landscape will gather at the eHealth Summit in Frankfurt am Main. CLYSO is proud to join as a sponsor, represented on-site by our expert Harald Trautwein.
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Featured topics
Security Update: Ceph Upstream Releases v20.2.4 & v19.2.6
Important security updates for Ceph Tentacle (v20.2.4) and Squid (v19.2.6): Learn about the resolved vulnerabilities, how to assess your risk, and key steps for post-upgrade key rotation and RGW STS tokens.
Ceph Days Zurich 2026
Welcome to the premier gathering for developers, storage architects, and admins in Germany, Austria, and Switzerland. Join us for a full day dedicated entirely to Ceph engineering, upstream updates, and community networking.
Container Days Hamburg 2026
ContainerDays are back in Hamburg from September 2–4, 2026. While we won't have a booth this year, our team will be walking the floor for all three days.
S2N November 2026 berlin
120 Petabytes of storage in production: How do you actually make that work at scale? Meet us at S2N in Berlin and catch our CEO Joachim Kraftmayer’s talk on Kubernetes, Ceph, and GitOps.
Scaling to Petabyte Scale: Whitepaper by SAP & CLYSO on Ceph & Rook
How do you run 120 PB of storage across 30 global regions with full digital sovereignty and zero vendor lock-in? Discover how SAP & CLYSO leverage Ceph and Rook at scale in our new technical whitepaper.
ZKI Tagung Aachen 2026
From September 7–10, 2026, the RWTH Aachen will host the joint DINI and ZKI conference. CLYSO will be there as sponsor with dedicated booth.
Post Mortem: Ceph v18.2.7 OSD High CPU Usage Caused by the Messenger
Over 100 clients requesting a single RADOS object triggered messenger throttling on a Ceph Reef OSD, causing CPU spikes above 300% and slow ops across unrelated PGs. Read our post-mortem detailing the root cause, the osd_client_message_cap throttle, and its link to Ceph Tracker #62512.
Bundestag Legal Opinion Revolutionizes IT Procurement for the public sector
A new legal opinion from the German Bundestag confirms that mandating open-source software in public tenders is fully procurement-compliant. In fact, it is recommended to dissolve costly vendor lock-ins. Read how this changes public IT infrastructure.
The Story Behind CLYSO
Why did we build CLYSO? In this episode of the Insider Research Podcast (German), our CEO Joachim Kraftmayer shares the story behind our founding vision, why we chose to focus on the toughest storage challenges, and how we are making Ceph enterprise-ready.
A Strategic Roadmap to Sovereign S3 Storage
Compliance, stability, and true sovereignty: Discover why transitioning from MinIO to Ceph is the next strategic step for your S3 infrastructure—and how to manage the migration seamlessly.
KubeCon Japan 2026
Kubernetes storage is taking over Tokyo and CLYSO is right in the thick of it. See you in the Maintainer Track!
SCS Summit 2026: Our Recap & Talk Recording
We joined the SCS Summit in Berlin this May. If you missed the joint presentation by Joachim Kraftmayer and Mario Listes on Ceph and Rook, you can now watch the full recording directly in our blog.
Catch CLYSO at KubeCon India 2026: Deepika Upadhyay Takes the Stage
Next week at KubeCon India, CLYSO's Deepika Upadhyay joins an expert panel to unpack real-world scenarios for deploying and scaling Rook Ceph in production environments.
Storage Technology 2026
Scalable sovereignty, maximum freedom: Learn how we make multi-petabyte Ceph environments boringly reliable.
Boston Technology Innovation Day 2026
On June 18, 2026, the Boston Technology Innovation Day (T.I.D.) will open its doors in Vaterstetten near Munich. The event brings together the latest trends in server, storage, and forward-looking IT infrastructure solutions.
Ceph Day Seattle 2026
On May 28, 2026, CLYSO is bringing the Ceph community back to Seattle. Join us for a full day of technical deep dives, real-world production insights, and direct networking with the core contributors and peers driving the project forward.
Ceph days London 2026
Join CLYSO at Ceph Days London! Catch David Mohren and Marcel Lauhoff live on stage for expert insights into AI-security and RGW performance.
CLYSO in Japan: Scaling Data Sovereignty for the AI Era at SusHi Tech Tokyo 2026
As Japan accelerates its digital transformation, CLYSO is on the ground in Tokyo to empower organizations with a true "Private Cloud" experience. Discover how we are helping research institutions and enterprises regain control of their data destiny through sovereign, petabyte-scale Ceph and S3 architectures.
CLYSO at KCD Helsinki 2026
KCD Helsinki 2026: Join 500 experts at Aalto University on May 20. CLYSO’s Robert Vasek and SAP will demonstrate how to use kcp to build vendor-agnostic interfaces and solve the challenge of API sprawl.
Recap-DSX Conference 2026-Frankfurt
Packed room, intense debates: DSX 2026 was a major success for us. Read our recap to see how David Mohren’s (CLYSO) session on the silo trap hit the mark and why our Ceph architecture sparked such high-level engagement.
clyso-ISO 27001
CLYSO stands for expertise in Cloud Native and Software Defined Storage. Since the beginning of this year, we’ve added an official seal to that expertise: We are now ISO/IEC 27001:2022 certified.
SCS Summit 2026
Talking about sovereignty is one thing; building it is another. Meet Mario Listes and Stephan Kante at the SCS Summit to discuss how we scale open-source infrastructure and Ceph storage in the real world. No sales pitches; just honest technical exchange.
CLYSO at KubeCon Europe 2026: Driving Sovereign Cloud with kube-bind, Rook, and 120 PB of Ceph
KubeCon Europe 2026 was a milestone week for CLYSO. From the CNCF Sandbox progress for kube-bind to a deep dive on managing 120 PB of Ceph with Rook, we explored the future of digitally sovereign, open cloud infrastructure alongside the global community.
From Petabyte Scale to KubeCon: CLYSO Drives Sovereign Storage in Amsterdam
Managing 120PB across 30 regions requires more than just hardware. Discover the operational resilience and technical stack behind one of the most ambitious Rook deployments to date.
kube-bind.io: Centralized Kubernetes Service Sharing
Stop the operator sprawl: Why reinstall every time when you can simply project APIs? Discover how kube-bind.io acts as a "Remote Desktop" for Kubernetes APIs and why CLYSO, alongside partners like SAP and Kubermatic, is bringing this project to the CNCF Sandbox.
CLYSO at Ceph Days India 2026: Mastering Dynamic S3 Architectures
CLYSO is heading to Bangalore for Ceph Days India 2026! Join our Senior Ceph Engineer and French Ambassador Frédéric Nass as he dives into dynamic S3 placement, and meet our local Indian team to discuss the future of CES and Chorus.
DSX-Data-Storage-Conference-2026
Are rigid hardware structures hindering your scalability? Join the CLYSO team at the DSX Data Storage Conference on April 16–17, 2026, in Frankfurt am Main.
Meet CLYSO at KubeCon & CloudNativeCon Europe in Amsterdam 26
CLYSO is heading to KubeCon + CloudNativeCon Europe 2026 in Amsterdam — join our Rook & Ceph deep dive session and connect with our cloud-native storage experts.
Open Source Becomes a Growth Engine When Operations Scale
Open source is widely adopted — but adoption alone creates no competitive advantage. Only organizations that master operations at scale can turn open source into a true engine for innovation and sustainable growth.
Post Mortem: Tentacle v20.2.0 OSD Crashing Due to EC Bug
An emergency support request revealed severe OSD crashes in Ceph Tentacle v20.2.0 after enabling erasure coding optimizations on CephFS. Here is our post-mortem detailing the root cause, the FastEC bug, and how we resolved the downtime using our automated build system.
KRITIS & NIS-2 Made Simple
KRITIS and NIS-2 don’t have to be complicated.
This guide explains in plain English what the new regulations mean, who is affected, and what companies actually need to do — plus how resilient Ceph storage and CLYSO support help turn compliance into reliable day-to-day operations.
Addressing MinIO Licensing Changes: The Guide to Seamless and Version-Safe Migration to Ceph
MinIO licensing trouble? Chorus makes the move to Ceph RGW simple and secure – with guaranteed preservation of your version history.
Object Storage Reimagined: The Foundation for AI & Cloud-Native Strategy
In this strategic keynote, CEO Joachim Kraftmayer examines the profound evolution of Object Storage—from a mere archiving solution to the essential data layer for modern AI and Big Data workloads.
Germany-Stack: Ceph as a Strategic Storage Component
Joachim Kraftmayer, CEO, has submitted a technical contribution outlining the role of Ceph in the Germany Stack. The article demonstrates why Ceph, as an open-source SDS solution, can serve as a foundational element for digital sovereignty and resilient infrastructures across federal, state, and municipal authorities.
Recap: Ceph Days Berlin 2025 – Two Days of Energy, Curiosity, and Community
The Ceph Days Berlin 2025 are officially wrapped up—and they reminded us once again what makes this community so unique. On November 12th and 13th, practitioners, operators, and long-standing contributors met at DESY in Zeuthen for two incredibly lively days of exchange.
Ceph Days Berlin 2025: A Deep Dive into Open Source Storage
Set for November 12th and 13th at the **Deutsches Elektronen-Synchrotron (DESY)**, this two-day conference will be an essential gathering for **Ceph developers, users, and industry experts**.
Ceph Days Berlin 2025 - Registration is now OPEN!
Join us in Berlin on November 12-13 for two full days dedicated to the future of open-source storage.
CLYSO to Present at Cephalocon 2025 in Vancouver
CLYSO is set to make a major impact at Cephalocon 2025 in Vancouver. Read more about the seven CLYSO experts who will be presenting their cutting-edge insights on open-source storage.
Open source storage: GDPR-compliant, scalable – and data sovereign
Digital data is growing fast, increasing storage demands. Companies must store large volumes efficiently while complying with strict GDPR rules. Meanwhile, data sovereignty is becoming essential: retaining full control over where, how, and by whom data is stored, processed, and protected.
Meet CLYSO at KubeCon & CloudNativeCon India 2025
Deepika Upadhyay: A Ceph and Open-Source Champion
CLYSO Ceph Meetup Juli 2025
Join us for our upcoming Ceph Meetup, bringing together the Ceph community from around the Munich area!
Meet CLYSO at Vivatech in 2025 Paris!
This year’s focus goes beyond innovation and Startups to emphasize themes like Cybersecurity & Quantum Computing, Sustainability, Climate & Mobility, Ethics, Privacy & Governance
Meet CLYSO at ISC High Performance 2025 in Hamburg!
We’re thrilled to announce that CLYSO will once again be at ISC High Performance 2025, taking place from June 10–12 at the CCH – Congress Center Hamburg
Kubernetes Meetup at CLYSO Munich on May 22nd
Join us at the CLYSO office in Munich-Schwabing for our first Kubernetes Meetup! Expect exciting talks, great company, and relaxed networking with food and drinks in a casual atmosphere. Whether you're a Kubernetes newcomer or expert, this evening is all about connecting, learning, and having fun with the community.
Ceph in the Spotlight: CLYSO Featured on Storage Insider
Ceph is revolutionizing enterprise storage! In an exclusive interview with Storage Insider, our CEO Joachim Krafmayer explains how CLYSO tackles modern data challenges using Ceph. Read the free article now (in German) and discover why more and more companies are turning to Open Source.
Critical Known Bugs in Ceph Quincy, Reef and Squid Versions
Several critical bugs have been identified across Ceph Quincy, Reef, and Squid releases that can impact cluster stability and data integrity. Read our summary to understand the affected components, potential risks, and recommended actions.
S3 Migration with Chorus
Discover how Chorus enables seamless, zero-downtime S3 data migration. This article shows how Chorus manages data consistency and ongoing writes to ensure efficient and reliable transfer.
How to Fix Kubernetes 1.31 Upgrade Issues from 1.30
Upgrading Kubernetes from 1.30 to 1.31 can cause errors with Cilium, CoreDNS, or Kube-Proxy, preventing pods from starting on the Control Plane. A simple workaround ensures a smooth upgrade: if you encounter this issue, you can easily roll back kubeadm and patch it. Check out our blog post for a step-by-step guide.
Meet CLYSO at KubeCon & CloudNativeCon Europe in London 25
Meet the CLYSO team at KubeCon + CloudNativeCon Europe 2025!
CLYSO Kubernetes Analyzer now available
CLYSO Kubernetes Analyzer – Full Insights Now on Our Blog! Learn how it helps you inspect your cluster, check health statuses, and optimize performance. Get insights on features, setup, and best practices. Read the full article now!
FOSDEM 2025 - See you in Brussels!
Heading to FOSDEM 2025? Join CLYSO experts in the Storage DevRoom to explore Ceph, Rook, OpenStack integration, and advanced troubleshooting. Connect with the community and level up your storage knowledge!
Adding Capacity to Ceph -- the CLYSO Way!
Learn how to simplify large-scale Ceph cluster expansions with enhanced control and zero downtime.
From Tonga to the world - sport, technology and passion
Kasete-Naufahu Skeen, a professional skier from the Royal Tonga Ski Federation and Joachim Kraftmayer, CEO of CLYSO GmbH and Kasete’s sponsoring partner, talking about Skiing and Open Source Software and passion.
Geneva calling - Cephalocon is around the corner
With six speakers delivering four keynotes and five expert sessions, CLYSO stands out at this year’s Cephalocon in Geneva. Join us December 4-5 as our team shares groundbreaking insights into Ceph performance, monitoring, and future innovations!
Meet Dan van der Ster at CERN
Join us at Cephalocon, running 4-5 December, for an interactive Birds of a Feather session with Dan van Ster. Ceph users come together with developers to share their experiences.
Ceph-volume - ceph osd migrate DB to larger ssd/flash device
Ceph-volume is a proper way of doing db migration. It uses ceph-bluestore-tool for the actual data movement and some other low-level stuff but LVM metadata updates are performed exclusivly by ceph-volume.
KubeCon + CloudNativeCon North America 2024
Join us at the Cloud Native Computing Foundation’s flagship conference in Salt Lake City, Utah, from November 12-15, 2024.
Opensourcing Chorus project
Insights into migrating infrastructure, whether to or from the cloud, or between different cloud providers. Our focus often centers around storage, particularly S3.
Building container images with Gardener
In our latest post, Róbert Vašek shows how to build container images with CLYSO Linux (Debian Trixie): Step-by-step image creation and Comparing Docker, Podman & the Garden Linux builder tool.
Ceph: A Journey to 1 TiB/s
Learn mor about CEPH and about cloud-native community to discuss, share and drive the development and use of cloud-native computing.
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