Apache Cassandra® @cassandra.apache.org · 27/09/2026Security, analytics, tooling. Five talks on our edges: Sidecar, mutual TLS, terabyte ingestion, analytics in place, and the command line. Apache Cassandra® track, Community Over Code, 11–13 Oct. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 26/09/2026Five talks coming about Apache Cassandra operations at scale. Sidecar automation. 400+ clusters migrated. 4→5 upgrades. Graceful shutdown. And a management-port decision argued in public. Apache Cassandra® track, Community Over Code, Glasgow. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 22/09/2026Storage and performance: five talks coming up on below the API. Memtables off the heap. The 6.0 write path. A profiler built into the server. Dictionary compression. And tries, aimed at tombstones. Community Over Code, Glasgow, 11–13 Oct. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 18/09/2026How does Apache Cassandra® shows its transactions are correct ? A consensus protocol. A TLA+ model of it. A fuzzer guided by it. A benchmark harness. And a talk arguing the result is just a database. Five talks, Community Over Code, Glasgow. cassandra.apache.org/_/events/202... 031
Apache Cassandra® @cassandra.apache.org · 06/09/2026"Much Ado About Nothing" is the optimistic version of a major-version upgrade, and the one nobody promises out loud. Mariah and Carlos on making Apache Cassandra® 4→5 predictable. Mariah McLaughlin, Carlos Rolo — NetApp Instaclustr cassandra.apache.org/_/events/202... 030
Apache Cassandra® @cassandra.apache.org · 05/09/2026Multi-partition transactions in Apache Cassandra® rest on Accord — CEP-15, a leaderless consensus protocol built to commit across shards without a coordinator becoming the bottleneck. Fedor Ryabinin, IMDEA Software Institute, on how it works. cassandra.apache.org/_/events/202... 021
Apache Cassandra® @cassandra.apache.org · 01/09/2026Bloomberg maintained a proprietary sidecar for years, then replaced it with Apache Cassandra® Sidecar and upstreamed what was missing. Isaac Reath and Paulo Motta on why they switched, and what it cost. cassandra.apache.org/_/events/202... 020
Apache Cassandra® @cassandra.apache.org · 30/08/2026Memtables live on the JVM heap. The heap has a garbage collector. The garbage collector has opinions about your p99. Branimir and Kamil on moving them fully off-heap. Branimir Lambov — Software Engineer, IBM/DataStax Kamil Leśniak — Software Engineer, IBM cassandra.apache.org/_/events/202... 031
Apache Cassandra® @cassandra.apache.org · 27/08/2026Request decoding. Validation. Coordination. Memtable allocation and flush. Compaction. Metrics. A year of source-level work on the Apache Cassandra® 6.0 write path, and the flamegraphs that found each one. Dmitry Konstantinov, NetCracker Technology. cassandra.apache.org/_/events/202... 030
Apache Cassandra® @cassandra.apache.org · 26/08/2026Tombstones and manual partitioning: two long-standing frustrations in Apache Cassandra®, and both fall out of one design decision. CEP-57 flattens the key hierarchy to a byte sequence and puts tries over it. Branimir Lambov and Christophe Bornet, IBM. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 25/08/2026Apache Cassandra® supports one authenticator per node, so changing authentication method on a live cluster means moving every client at once. CEP-50 lets clients advertise what they support while the server keeps the decision. Joel Shepherd, Amazon.com. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 25/08/2026Apache Cassandra® drivers ignore topology DOWN events — they aren't reliable. So a node deliberately shutting down keeps taking requests until its connections fail. CEP-59 tells the client instead. Jane He, IBM. cassandra.apache.org/_/events/202... 010
Apache Cassandra® @cassandra.apache.org · 23/08/2026400+ Apache Cassandra® clusters. Up to 50 in a night. Zero downtime. Pegasystems and NetApp Instaclustr built a Migration API to do it. Carlos Rolo brings the alert storms, the platform limits and the split-operations bug too. cassandra.apache.org/_/events/202... 020
Apache Cassandra® @cassandra.apache.org · 18/08/2026"Apache Cassandra®: A Normal Database" Transactional metadata. Distributed transactions. Full ACID. Mutation tracking. Scott Andreas lays years of community work side by side and asks what's left of the caveats – Core Databases, Apple. cassandra.apache.org/_/events/202... 020
Apache Cassandra® @cassandra.apache.org · 17/08/2026[RELEASES] ⦿ Python Driver version 3.30.1 ⦿ GoCQL Driver version 2.0.0 ⦿ GoCQL Driver version 2.1.2 ⦿ Java Driver version 4.19.3 ⦿ Analytics version 0.4.0 Download them at: cassandra.apache.org/_/download.h... Thanks to everyone who helped make all these releases happen ‼️ 010
Apache Cassandra® @cassandra.apache.org · 16/08/2026[RELEASE] Apache Cassandra 5.0.9 is out ‼️ Download it at: cassandra.apache.org/_/download.h... News: github.com/apache/cassa... Changelog: github.com/apache/cassa... 020
Apache Cassandra® @cassandra.apache.org · 16/08/2026[RELEASE] Apache Cassandra 6.0-alpha2 is out ‼️ This alpha off the cassandra-6.0 release branch is for testing and development purposes. Download it at: downloads.apache.org/cassandra/6.... News: github.com/apache/cassa... Changelogs: github.com/apache/cassa... 010
Apache Cassandra® @cassandra.apache.org · 16/08/2026The Apache Cassandra® community is running a three-day track at Community Over Code 2026, the official conference of the Apache Software Foundation, at the Hilton Glasgow. Twenty sessions, from twenty-seven speakers across a dozen organisations. cassandra.apache.org/_/events/202... 011
Apache Cassandra® @cassandra.apache.org · 23/03/2026[RELEASE] Apache Cassandra Releases 5.0.7 , 4.1.11 and 4.0.20 are out ‼️ Downloads: cassandra.apache.org/_/download.h... Changelogs: • github.com/apache/cassa... • github.com/apache/cassa... • github.com/apache/cassa... 020
Apache Cassandra® @cassandra.apache.org · 23/03/2026[RELEASE] Apache Cassandra Sidecar 0.3.0 is out! Downloads: downloads.apache.org/cassandra/ca... Changelog: github.com/apache/cassa... #ApacheCassandra #NoSQL #OpenSource 020
Apache Cassandra® @cassandra.apache.org · 01/02/2026@IBM, thanks for the love ❤️ Supporting (vendor-neutral) open source projects is everything to us. www.ibm.com/opensource/ 040
Apache Cassandra® @cassandra.apache.org · 09/12/2025Jon Haddad's third post in his Cassandra series on maximising cost efficiency rustyrazorblade.com/post/2025/07... 000
Apache Cassandra® @cassandra.apache.org · 19/11/2025An incredible increase in numbers, from last week's meet-up in Seattle cassandraossmeetup.splashthat.com It's a repeating story of companies doubling down their consolidation efforts on Apache Cassandra. 020
Apache Cassandra® @cassandra.apache.org · 09/11/2025Did you know Apache Cassandra was the top-most mentioned Apache technology at the ASF's Community Over Code conference this year 🫡 Thanks for the write Paul Brebner www.linkedin.com/pulse/commun... 000
Apache Cassandra® @cassandra.apache.org · 29/10/2025[RELEASE] Apache Cassandra 5.0.6 Downloads cassandra.apache.org/download debian.cassandra.apache.org redhat.cassandra.apache.org/50x/ Changelog 000
Apache Cassandra® @cassandra.apache.org · 22/10/2025If you're in Seattle Nov 11th ! C* OSS MeetUp 5:15-8:00PM Pizza & some great talks… 1. [Apple] Streaming C*: Native CDC w/ Kafka 2. [Netflix] Behind the Scenes: Empowering Live Events w/ C* 3. [AWS] AWS Commitment to OSS 4. [Uber] First-Class Support for C* MVs cassandraossmeetup.splashthat.com 022
Apache Cassandra® @cassandra.apache.org · 22/10/2025[RELEASE] Apache Cassandra Java Driver 4.19.1 Downloads downloads.apache.org/cassandra/cassandra-java-driver/4.19.1/ repo.maven.apache.org/maven2/org/apache/cassandra/ Change log github.com/apache/cassandra-java-driver/tree/4.19.1/changelog 020
Apache Cassandra® @cassandra.apache.org · 20/10/2025[RELEASE] Apache Cassandra 4.0.19 Downloads cassandra.apache.org/download debian.cassandra.apache.org redhat.cassandra.apache.org/40x/ Changelog 000
Apache Cassandra® @cassandra.apache.org · 16/10/2025[RELEASE] Apache Cassandra GoCQL Driver version 2.0.0 Downloads downloads.apache.org/cassandra/cassandra-gocql-driver/2.0.0 You can add the driver to your project with the "v2.0.0" tag: ``` go get github.com/apache/cassandra-gocql-driver/v2@v2.0.0 ``` Changelog 001
Apache Cassandra® @cassandra.apache.org · 12/10/2025Vote passes to include CEP-38 🥳 CQL Management API This work will replace JMX operational functionality and tooling with a CQL interface. More info: cwiki.apache.org/confluence/d... 032
Apache Cassandra® @cassandra.apache.org · 12/10/2025Living with Accord by Ariel Weisberg Ready to unlock the power of strictly serializable multi-key transactions in Apache Cassandra with just one WAN round trip? 🚀 The Accord consensus protocol is the future but migrating a live, production cluster can seem daunting www.youtube.com/watch?v=MKUY... 020
Apache Cassandra® @cassandra.apache.org · 26/09/2025We are happy to announce Ekaterina Dimitrova as the next PMC Chair for our community! Ekaterina has been part of our community for many years and has been a great champion of our community. She takes over from Dinesh Joshi, whom we thank for all his service the past year. 111
Apache Cassandra® @cassandra.apache.org · 17/09/2025Vote passes to include CEP-54 🥳 ZSTD with Dictionary SSTable Compression Adding dictionary support to ZSTD can further improve both metrics, yielding 3–4x improvements in certain workloads. cwiki.apache.org/confluence/d... 031
Apache Cassandra® @cassandra.apache.org · 15/09/2025Serban Teodorescu presenting Efficient export with Cassandra Analytics www.communityovercode.org – Minneapolis 110
Apache Cassandra® @cassandra.apache.org · 15/09/2025Gokul Prabagaren from CapitalOne presenting Life is better, since we choose right keys for Cassandra Home www.communityovercode.org – Minneapolis 130
Apache Cassandra® @cassandra.apache.org · 15/09/2025Bernardo Botella Corbi presenting Handling Large Blobs in Apache Cassandra CDC with Kafka and Object www.communityovercode.org – Minneapolis 211
Apache Cassandra® @cassandra.apache.org · 15/09/2025Josh McKenzie presenting Cassandra as a Cloud-Native System of Record: Unlocking the Big Data Ecosystem with Modular APIs www.communityovercode.org – Minneapolis 111
Apache Cassandra® @cassandra.apache.org · 15/09/2025Johnny Miller's lightning talk on Async Python Integration with Apache Cassandra www.communityovercode.org – Minneapolis 020
Apache Cassandra® @cassandra.apache.org · 14/09/2025Saranya Krishnakumar and Francisco Guerrero presenting The Road Ahead: Next steps for Cassandra Sidecar post v0.1 www.communityovercode.org – Minneapolis 121
Apache Cassandra® @cassandra.apache.org · 14/09/2025Bernardo Botella Corbi presenting Apache Cassandra Constraints this is CEP-42, more info on it here: cwiki.apache.org/confluence/d... www.communityovercode.org – Minneapolis 221
Apache Cassandra® @cassandra.apache.org · 14/09/2025Aaron Ploetz presenting on backups made easy with Medusa and Kubernetes 110
Apache Cassandra® @cassandra.apache.org · 14/09/2025Caleb Rackliffe presenting Mastering Storage Attached Indexes: Transforming Cassandra Data Modeling 110
Apache Cassandra® @cassandra.apache.org · 14/09/2025Andres Beck-Ruiz and William Nguyen presenting Performance Improvements & Upgrade Challenges: Bloomberg’s Road to Apache Cassandra 5.0 www.communityovercode.org– Minneapolis 121
Apache Cassandra® @cassandra.apache.org · 14/09/2025Join us at Community over Code's Cassandra Track, Sun Sept 14th for How Cassandra Empower AI and Knowledge Graph Storage with Scale Yichen Wei www.communityovercode.org– Minneapolis, Minnesota, USA, September 11-14 000
Apache Cassandra® @cassandra.apache.org · 14/09/2025Join us at Community over Code's Cassandra Track, Sun Sept 14th for Life is better, Since we choose right keys for Cassandra Home Gokul Prabagaren www.communityovercode.org– Minneapolis, Minnesota, USA, September 11-14 000
Apache Cassandra® @cassandra.apache.org · 13/09/2025Ariel Weisberg presenting "Living with Accord" 111
Apache Cassandra® @cassandra.apache.org · 13/09/2025@taco.cat presenting "Witness Replicas: Reducing Storage Costs in Apache Cassandra" Saving 1/3 on storage, cpu and IO, is some serious spare change. 112
Apache Cassandra® @cassandra.apache.org · 13/09/2025Running Apache Cassandra in Kubernetes: hands on with K8ssandra by Alexander Dejanovski and Michael Burman 110
Apache Cassandra® @cassandra.apache.org · 13/09/2025Learn from the best… "Contributing to Cassandra: Journeys from Newcomer to PMC" with Cheng Wang, Dinesh Joshi, Ekaterina Dimitrova, Bernardo Botella Corbi, Jordan West www.communityovercode.org – Minneapolis 111