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Blog • Event Recaps

Recap - Ceph Day Zurich 2026

Full house at the University of Zurich: Ceph Day 2026 brought the community together for 16 deep-dive sessions, lively debates, and genuine open-source exchange. Check out our official recap for the key highlights, takeaways, and speaker slides!
Ceph Upstream ROOK Ceph Community Ceph Day
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Events • External Conferences

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.
CLYSO Enterprise Storage Event Ceph
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News • Product Updates

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 Upstream Support Ceph Upstream Ceph Support Ceph
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Events • Conferences

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.
Ceph Upstream ROOK Ceph Ceph Community Event
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Events • External Conferences

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.
Ceph Upstream Kubernetes Event Ceph
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Events • External Conferences

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.
Ceph Upstream Event Ceph
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Resources • Whitepapers & Documents

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.
ROOK Whitepaper Ceph
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Events • External Conferences

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.
ZKI Tagung Aachen
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Blog • Tech Insights

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.
Ceph Upstream Ceph Deep Dive
Open resource
News • Product Updates

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.
Ceph Upstream CLYSO Enterprise Storage CES Training Ceph Training Ceph Consulting Ceph Full System Analysis Bundestag Legal Opinion IT Procurement
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Resources • Recordings & Videos

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.
CLYSO Enterprise Storage Ceph Upstream Storage Storage Anders Denken
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Blog • How-tos

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.
Migration from MinIO to Ceph Ceph Upstream Corda S3 Browser MinIO Open Source Storage
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Resources • Recordings & Videos

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.
Ceph Upstream 2026 Event Recap
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Events • External Conferences

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.
Kubernetes Ceph Upstream Event Ceph Community Event
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Events • External Conferences

Storage Technology 2026

Scalable sovereignty, maximum freedom: Learn how we make multi-petabyte Ceph environments boringly reliable.
Storage Technology 2026 Open Source
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Events • External Conferences

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.
Boston Tid 2026 Technology Partner
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Events • External Conferences

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 Upstream Apeiro Platform Mesh with kcp Ceph Seattle
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Events • Live Slots

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.
Ceph Upstream Ceph CES
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Events • External Conferences

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.
Event Souvereign Storage Infrastructure
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Events • External Conferences

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.
Kubernetes Kcp Ceph
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Blog • Event Recaps

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 Enterprise Storage Ceph Upstream Dsx2026 Storage Conference
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News • Company News

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.
Iso27001 CLYSO Iso Certified
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Events • External Conferences

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.
SCS Summit 2026 Sovereignty
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Blog • Event Recaps

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.
Ceph Upstream ROOK Kubernetes Apeiro Platform Mesh with kcp KubeCon Rook
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Events • External Conferences

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.
Kubernetes ROOK Ceph Upstream Apeiro Platform Mesh with kcp KubeCon Kubernetes
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Blog • Tech Insights

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.
Apeiro Platform Mesh with kcp Kubernetes Kubernetes Multicluster
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The Vidhana Soudha landmark in Bangalore, venue host city for Ceph Days India 2026 featuring CLYSO.
News • Company News

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.
Ceph CES
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News • Company News

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.
Dsx Data Storage Conference
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Events • External Conferences

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.
Kubernetes Kubernetes Ceph
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Blog • Opinion

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.
Ceph Upstream Open Source Platform Engineering
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Blog • Tech Insights

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.
Ceph Upstream Tentacle Osd
Open resource
Blog • How-tos

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.
Ceph Upstream Kritis Nis-2
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Blog • How-tos

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.
Chorus Ceph Upstream Migration from MinIO to Ceph Ceph Cephrgw
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Events • Live Slots

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.
Ceph AI Infrastructure
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News • Company News

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.
Ceph Upstream Ceph Deutschland Stack
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Blog • Event Recaps

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 Upstream CLYSO Enterprise Storage Ceph Days Ceph Community
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Events • Conferences

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 Upstream Ceph Day Open Source
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Events • Conferences

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.
Ceph Upstream Ceph Event
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Events • External Conferences

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.
Kubernetes Linux
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Blog • Opinion

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.
CLYSO Enterprise Storage Cybersecurity Souvereign Storage Infrastructure
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Events • External Conferences

Meet CLYSO at KubeCon & CloudNativeCon India 2025

Deepika Upadhyay: A Ceph and Open-Source Champion
Ceph Upstream Kubernetes Ceph Rook
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Events • Conferences

CLYSO Ceph Meetup Juli 2025

Join us for our upcoming Ceph Meetup, bringing together the Ceph community from around the Munich area!
Ceph Upstream Ceph
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Events • External Conferences

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
CES
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Events • External Conferences

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
CES Event
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Events • Conferences

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.
Kubernetes
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Blog • Opinion

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.
Ceph Upstream Ceph CES
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Blog • Tech Insights

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.
Ceph Upstream Ceph Quincy
Open resource
Blog
Blog • Tech Insights

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.
Chorus Corda S3 Browser Ceph Upstream Kubernetes
Open resource
Blog
Blog • Tech Insights

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.
Kubernetes
Open resource
A promotional banner for KubeCon + CloudNativeCon Europe 2025 is overlaid on a scenic photograph of London, England. The image showcases the Millennium Bridge with pedestrians walking toward St. Paul’s Cathedral at dusk. The City of London School’s crest and logo are visible on a nearby building. The event details, including the date (April 1-4, 2025) and location (London, England), are displayed along with the hashtags #KubeCon and #CloudNativeCon.
Events • External Conferences

Meet CLYSO at KubeCon & CloudNativeCon Europe in London 25

Meet the CLYSO team at KubeCon + CloudNativeCon Europe 2025!
Kubernetes ROOK Kubernetes Ceph
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Blog • Tech Insights

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!
Kubernetes
Open post
FOSDEM 2025 event announcement featuring a picturesque view of the historic Grand Place in Brussels, Belgium
Events • External Conferences

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!
ROOK Ceph Upstream Ceph CES
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Kasete Skeen in his favourite suite - a race suite
News • Company News

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.
Ceph
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Cephalocon Logo
Events • External Conferences

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!
Ceph Upstream Ceph Cephalocon
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Events • Live Slots

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 Upstream Ceph Ceph Community
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Blog
Blog • Tech Insights

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.
Ceph Upstream Ceph Osd
Open resource
Events • External Conferences

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.
Kubernetes Cloud Native
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Blog
Blog • Tech Insights

Ceph Unleashed

Ceph Unleashed: Upmap for Optimal Data Placement
Ceph
Open post
Blog
Blog • Tech Insights

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.
Linux
Open resource
Blog
Blog • Tech Insights

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.
Linux
Open resource
Blog
Blog • Tech Insights

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.
Ceph
Open resource